Read Ebook: Proceedings of the California Academy of Sciences Series 3 Volume 4 (Zoology) by Various

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Perhaps San Benito, Cerros, Natividad. Magdalena, Santa Margarita. Socorro, Clarion.

SOUTH FARALLON ISLAND.

Color above smoky seal-brown, lightest on the snout and limbs, dotted, spotted and blotched with pale straw-yellow on top and sides of head, neck, body, limbs and tail; largest blotches, on sides of neck, 2 by 4 millimetres. Lower surfaces dirty yellowish white.

Length to anus 72 38 58 66 67 75 Length of tail 64 33 50 52 56 71 Snout to gular fold 20 11 17 18 19 20 Nostril to orbit 4 2 1/2 3 4 3 1/2 4 Fore limb 21 13 18 19 20 22 Hind limb 24 15 20 20 22 24

Sixteen specimens were collected by Mr. Fuchs on South Farallon Island, February 8, 1899, and four by Mr. L. M. Loomis, July 9, 1896. They were found under piles of loose stone.

The spots on the type specimen are larger and somewhat more numerous than on any of the others.

SAN MIGUEL ISLAND.

The color above in alcoholic specimens is yellowish brown paler on the head and limbs and often becoming fawn-color on the tail. The upper lip and all the lower surfaces are white or dull yellow. Young specimens are much darker than adults, and the lower surfaces often are minutely dotted with brown.

Length to anus 25 36 49 52 52 56 Length of tail 20 31 64 56 63 59 Width of head 3 1/2 5 7 6 1/2 7 8 Snout to orbit 2 2 3 3 3 3 Snout to gular fold 6 7 1/2 10 10 10 10 1/2 Snout to fore limb 7 10 13 13 14 14 Between limbs 15 22 31 36 33 38 Fore limb 5 7 9 9 8 1/2 9 Hind limb 5 1/2 7 1/2 9 1/2 9 1/2 9 1/2 10

The color above is grayish, brownish, or greenish blue, with a series of dark brown blotches on each side of the back. A pale longitudinal band separates the dorsal from the lateral regions. The sides are brownish or grayish, mottled with darker brown and dotted or suffused with green or pale blue. The head is usually crossed by narrow brown lines, more or less irregular in distribution. A brown line connects the orbit and upper corner of the ear, and is continued backward on the neck. There is a large blue patch on each side of the belly, bordered internally with black in highly colored males. The chin and throat are blue, pale anteriorly and changing to black posteriorly, crossed by narrow oblique black lines which converge posteriorly and blend with the black patches on the throat and in front of the shoulders in males. There is a white patch at each side of the anus, and a yellowish white band along the series of femoral pores.

Length to anus 64 66 70 70 Length of tail 76 68 78 79 Snout to ear 14 13 14 16 Width of head 14 12 14 15 Shielded part of head 14 13 14 15 Fore limb 27 26 27 30 Hind limb 41 39 41 46 Base of fifth to end of fourth toe 16 15 16 18

Five specimens in the collection of the California Academy of Sciences were secured by Mr. R. H. Beck on San Miguel Island, March 26, 1903.

One specimen was taken by Mr. Beck on San Miguel Island, March 26, 1903. It has dorsals in 14 1/2 x 49 rows, temporals smooth, scales on arm and forearm smooth, and dark ventral lines along the middles of the scale rows. It seems to differ from the Santa Rosa Island specimens only in the slightly more feeble carination of the scales generally, the small size of the azygous prefrontal and of the scales on the under surface of the forearm, and a tendency toward the formation of fourteen rows of ventral scales shown by the presence of a few small scales along the edge of each lateral fold in addition to the usual twelve longitudinal rows. There are sixty-six ventrals in a row between the chin and the anus.

SANTA ROSA ISLAND.

The measurements of these specimens are

Length to anus 21 22 24 32 33 35 41 42 Length of tail 14 16 21 23 23 .. 46 27 Width of head 3 3 3 3/4 5 4 1/2 5 5 6 Snout to orbit 1 1/2 1 1/4 1 1/2 2 2 1/4 2 2 1/4 2 1/2 Snout to gular fold 5 5 6 7 1/4 7 8 8 1/2 9 1/2 Snout to fore limb 6 6 8 10 9 10 12 12 Between limbs 13 14 15 21 19 23 26 26 Fore limb 4 1/2 4 5 6 1/4 6 6 7 1/4 8 Hind limb 4 1/2 4 5 6 1/2 6 6 1/4 7 1/2 8

The specimens from Santa Rosa Island all have dorsals in fourteen longitudinal series. The number of transverse series between the interoccipital plate and the backs of the thighs is fifty in one specimen, fifty-one in three, fifty-two in one, and fifty-three in one. One has the brachial scales very weakly keeled. They were collected by Dr. Gustav Eisen in June, 1897.

SANTA CRUZ ISLAND.

Yarrow and Cope record this species as having been collected on Santa Cruz Island by Mr. H. W. Henshaw in June, 1875, but another portion of the same lot of specimens is stated to be from Santa Cruz, California. Mr. Henshaw tells me he never has collected in Santa Cruz County, and that these specimens unquestionably came from Santa Cruz Island where he collected in the summer of 1875.

Yarrow and Cope record two specimens collected on Santa Cruz Island by Mr. H. W. Henshaw in June, 1875. One of these is still in the National Museum, where I examined it some years ago.

ANA CAPA ISLAND.

I believe no reptiles have been recorded from Ana Capa. Only the following species has come into my hands.

SAN NICOLAS ISLAND.

PLATE V, FIG. 2.

SANTA BARBARA ISLAND.

I believe no reptiles or amphibians have been recorded from this island. I have seen only the following species:

Mr. Joseph Grinnell has sent me four Xantusias from Santa Barbara Island. They are smaller than the specimens I have seen from the other islands, but seem to differ in no other respect. The largest is 64 mm. from snout to vent. All are dark drab above with small, discrete black spots. One shows traces of longitudinal dorsal bands near the tail.

SANTA CATALINA ISLAND.

One salamander, two lizards, and a rattlesnake have been taken on Santa Catalina.

A single specimen collected at Avalon, Santa Catalina Island, by Mr. A. M. Drake seems indistinguishable from the mainland species. It has nineteen costal grooves, slender limbs, and narrow head. The coloration is uniform slaty brown above, paler below. Three specimens secured on this island by Mr. Fuchs differ from this one only in the slightly paler coloration.

I have seen no specimens of this lizard from Santa Catalina, but Mr. J. J. Rivers states that he has received several from this island.

Yarrow records a rattlesnake as having been taken by Mr. P. Schumacher on Santa Catalina Island in 1876. Stejneger also refers to its presence there. I have seen no snakes from any of the Californian islands.

SAN CLEMENTE ISLAND.

Two species of lizards are known from this island.

Two specimens were taken on San Clemente Island by C. H. Townsend in 1889. Mr. A. W. Anthony and Dr. E. A. Mearns also found the species there and sent specimens to the National Museum.

I have examined those collected by Mr. Townsend and Mr. Anthony and six specimens sent me by Mr. Joseph Grinnell, of which three are now in the collection of the Academy, and am unable to distinguish the island lizards from the form originally described by Baird and Girard. The femoral pores in three specimens are eleven, twelve, and fourteen.

PLATE V, FIG. 1.

This lizard was found on San Clemente by Mr. C. H. Townsend. I have examined several specimens in the collections of the University of California and the California Academy of Sciences without finding differences between them and specimens from San Nicolas and Santa Barbara Islands.

LOS CORONADOS.

SAN MARTIN ISLAND.

Head above grayish olive; central portion of neck and back dark brown, with 2 series of rather indefinite darker brown blotches each bordered behind and sometimes laterally by pale blue scales; some scattered pale blue dots on back and upper surfaces of limbs and tail; tail marbled with brown and blue; sides mottled with brown and pale bluish yellow, forming stripes on sides of neck; chin and gular region indigo, mottled with bluish yellow at sides; postaxillary blotch blackish indigo; lower surfaces of body, limbs and tail grayish indigo.

Length to anus 62 Length of tail 92 Snout to ear 15 Shielded part of head 14 Width of head 13 Fore limb 26 Hind limb 46 Base of fifth to end of fourth toe 18 Fifth toe 10

The ground color above is olive-brown, more grayish on the sides, crossed by from 9-11 dark bands. These dark bands may be brown or brownish black, continuous or broken, and are darker laterally, where their scales are tipped with white. Tail proximally marked like back, distally unicolor. Head and limbs unicolor or with traces of olive-brown mottlings. Lower surfaces suffused with gray, edges of scales lighter, darker gray or slate-colored lines along the middle of each longitudinal scale row.

Length to anus 103 110 117 Length of tail 167 128 125 Snout to ear 21 25 26 Width of head 14 19 20 Head to interoccipital 17 20 21 Fore limb 27 30 33 Hind limb 34 38 41 Base of fifth to end of fourth toe 11 12 13

A young gopher snake taken on San Martin Island by Dr. Streets is still in the National Museum. The Academy has an adult specimen collected there by Mr. Beck, May 3, 1903.

SAN BENITO ISLAND.

I know of no records of reptiles from San Benito. The Academy has received specimens of but one kind of lizard, which is here described as new.

Head above uniform olive-brown; central portion of the neck, back and base of tail with a uniform brown ground with thickly scattered dots of pale blue on single scales; sides yellowish brown with scattered scales of pale yellow; upper surfaces of limbs and tail light brown dotted with pale blue; chin and gular region deep indigo with yellowish marks laterally and on labials; lower surfaces of body and limbs grayish indigo; large postaxillary blotch of blackish indigo.

Sex ? ? Length to anus 49 61 Length of tail 59 76 Snout to ear 11 14 Shielded part of head 11 13 Width of head 10 12 Fore limb 22 26 Hind limb 37 43 Base of fifth to end of fourth toe 15 18

Two specimens of this lizard were secured.

CERROS ISLAND.

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