San Martin Island.
The only reptile heretofore known from San Martin is a gopher snake found by Dr. Streets. The Academy has also specimens of two species of lizards from the island, both of which are here described as new. The Uta probably is confined to the island, while the Gerrhonotus seems to be found throughout the San Diegan Fauna.
1. Uta martinensis sp. nov.
Plate VI.
Diagnosis.—Similar to U. stansburiana but larger; fifth toe reaching to or beyond end of second; dorsals imbricate, mucronate, strongly keeled; scales on upper surfaces of arm and thigh keeled; scales of ear-denticulation longer than the longest diameter of largest temporal; caudals large, imbricate, strongly keeled and mucronate.
Type.—Adult male, Cal. Acad. Sci. No. 4698, San Martin Island, Lower California, Mexico, R. H. Beck, May 3, 1903.
Description of the Type.—Body and head considerably depressed; snout low, rounded; nostrils large, opening upward and outward nearer to end of snout than to orbit; head plates large, smooth, nearly flat, interparietal largest; frontal divided transversely; 3 or 4 enlarged supraoculars, separated from the frontals and frontoparietals by 1 series of small plates; superciliaries long, narrow and projecting; central subocular very long, narrow and strongly keeled; rostral and supralabials long and low; 6 supralabials; symphyseal small, followed on each side by a series of 5 or more large plates which are separated from the infralabials by 1 or 2 series of sublabials; gular region covered with smooth, hexagonal or rounded scales changing to granules on the sides of the neck and to larger imbricate scales on the strong gular fold, largest on the denticulate edge of gular fold where larger than scales on belly; a group of enlarged plates in front of ear-opening; ear denticulation very long, of 3 scales, largest exceeding in length longest diameter of largest plate in front of ear; back covered centrally with nearly uniform imbricate, keeled scales which change gradually to granules on neck and sides of body, and become mucronate posteriorly; scales largest on tail, strongly imbricate, strongly keeled and mucronate above and on sides; posterior surfaces of thighs and arms covered with small granular scales similar to those on sides of body; other surfaces of limbs provided with imbricate scales, keeled on upper surfaces of arm, forearm, thigh, leg, and foot; adpressed fore limb not reaching insertion of thigh; fifth finger reaching about to end of second; fifth toe reaching to or beyond end of second; femoral pores 15; 17-23 of largest dorsals equaling shielded part of head.
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
| 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 |
Only one specimen of this Uta was secured.
2. Gerrhonotus scincicauda ignavus subsp. nov.
Plate VII, Figs. 1-2.
Diagnosis.—Similar to G. scincicauda but with scales generally more strongly carinate; temporal scales keeled; dorsal and caudal scales strongly keeled; scales of arm and forearm keeled; lower lateral caudals keeled; dorsals in 14 (sometimes 12-2/2) longitudinal rows; dark lines along the middles of ventral rows; azygous prefrontal large; interoccipital single; back usually with complete dark cross-bands.
Type.—Cal. Acad. Sci. No. 4699, San Martin Island, Lower California, Mexico, R. H. Beck, May 3, 1903.
Description.—Body long and rather slender, with short limbs and very long tail; head pointed with flat top and nearly vertical sides, its temporal regions often greatly swollen in old specimens; rostral plate rounded in upper outline; on top of head behind rostral a pair of small internasals, a pair of small frontonasals, a very large azygous prefrontal, a pair of large prefrontals, a long frontal, a pair of frontoparietals, 2 parietals separated by an interparietal, a pair of occipitals, and an interoccipital; 2 series (of 5 and 3) supraoculars and a series of small superciliaries; temporal scales keeled, lower sometimes only weakly; upper labials much larger than lower; 2 series of large sublabial plates below infralabials, lower larger; gular scales smooth and imbricate; scales on arm and forearm keeled; scales on upper surfaces and sides of neck, body and tail large, rhomboidal, slightly oblique, strongly keeled, strengthened with bony plates, and arranged in both transverse and longitudinal series; number of longitudinal dorsal series 122/2-14; number of transverse series between interoccipital plate and backs of thighs 42-43; a band of granules along each side from large ear-opening to anus, usually hidden by a strong fold; ventral plates about size of dorsals, smooth, imbricate and arranged in 12 longitudinal series; number
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[8] Length of tail 167 128[9] 125[9a] 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
| Length to anus | 103 | 110 | 117[8] |
| Length of tail | 167 | 128[9] | 125[9a] |
| 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 |
The three specimens of Gerrhonotus from San Martin Island are very similar to the species now known as G. scincicauda, but are much rougher than specimens from central and northern California. Reëxamination of the Californian material at hand shows that the San Martin Island form is found throughout the San Diegan Fauna and the western slope of the southern Sierra Nevada below the range of G. palmeri. It may be distinguished from its more northern relative by the following synopsis of characters:—
a.—Temporals smooth; scales on arm smooth; scales on forearm smooth or weakly keeled; lateral caudals five scales behind anus smooth 6-9 rows from inferior mid-caudal line.
G. scincicauda.
a.2—Temporals keeled; scales on arm keeled; scales on forearm keeled; lateral caudals 5 scales behind anus smooth only 4-5 rows from inferior mid-caudal line.
G. s. ignavus.
3. Pituophis catenifer (Blainville).
Pituophis sayi bellona Streets, Bull. U. S. Nat. Mus. no. 7, 1877, p. 40; Yarrow, Bull. U. S. Nat. Mus. no. 24, 1882, p. 106; Cope, Report, U. S. Nat. Mus. 1898 (1900), p. 876.
Pituophis catenifer deserticola Van Denburgh, Proc. Cal. Acad. Sci. 2d ser. v. 5, 1895, P. 149.
A young gopher snake taken on San Martin Island by Dr. Streets is still in the National Museum. The Academy has an adult specimen (No. 4702) collected there by Mr. Beck, May 3, 1903.