TEIID LIZARDS OF THE GENUS CNEMIDOPHORUS 205 



lu tlial ionii, ullliuugli lli*-'y may be iiileigiiule.s bolwoi'ii ruOidua and 

 tcssellatus. 



'Jluis, the only known locality for celeiipes seems to bo San Jose 

 Island (l)ickei'soii, IDIJ), p. 472, U.S.N.M., A.M.N.IL, M.C.Z., 

 C.A.S.). 



Hahitat and habits. — Information on the habitat and habits of 

 this species is apparently confined to the following statement of 

 Van Denburgh (1922, p. 551) "This rare and very shy form was 

 found in dense brush thickets from the vicinity of the beaches well 

 into the interior of the island. " 



Acuities. — This whiptail is confined to San Jose Island which is 

 but a short distance from the mainland of Lower California where 

 '/•uhkl'us, apparently its only possible ancestor, is found. Celeripes is 

 obviously more closely related to i-ubklus than to tessellatus because 

 red or pinkish is found on its ventral surface. The appearance of 

 a darker dorsal color pattern in the brush-inhabiting celeHpes is 

 probably due to the environment, since the same variation occurs in 

 foothill (or brush-inhabiting) specimens of tessellatus as discussed 

 under that form (pp. 15-1-157, 16G). 



CNEMIDOPHORUS TESSELLATUS MARTYRIS (Stejneger) 

 SAN PEDRO MARTIR ISLAND WHIPTAIL 



1891. Cncmklophorus martijris Stejnege21, Proc. U. S. Nat. Mus., vol. 14, p. 407 

 (type locality, "San Pedro Martir Island, Gulf of California, Mexico"; type 

 specimen, U.S.N.M. No. 15620, paratype, U.S.N.M. No. 15621, E. Palmer, coUec- 

 tor).— BouLENGER, Zool. Rec. for 1891, vol. 28, " Reptilia," 1892, p. 8.— Van 

 Denburgh, Proc. Calif. Acad. Sci., ser. 2, vol. 5, 1890, p. 125. — Cope, Ann. Rep. 

 U. S. Nat. Mus. for 1898, 1900, p. 584.— Gadow, Proc. Zool. Soc. London, 1906, 

 p. 373. — Van Denburgh and Slevin, Proc. Calif. Acad. Sci., ser. 4, 1914, p. 

 147. — Stejneger and Barbour, Check List N. A. Amph. and Rept., 1917, p. 

 00. — D1CKER8ON, Bull. Amer. Mus. Nat. Hist., vol. 41, 1919, p. 474. — Van Den- 

 burgh and Slevin, Proc. Calif. Acad. Sci., ser. 4, vol. 11, 1921, p. 97. — Van 

 Denburgh, Occas. Pap. Calif. Acad. Sci., vol. 10, 1922, p. 538. — Nelson, Mem. 

 National Acad. Sci., vol. 21, 1922, p. 114. — Schmidt, Bull. Amer. Mus. Nat. 

 Hist., vol. 46, 1922, p. 678. — Stejneger and Barbouk, Check List N. A. Amph. 

 and Rept., ed. 2, 1923, p. 71. 



Systematic notes. — C. martyrls is here reduced to subspecific rank 

 because the northern form recently discovered on Sal Si Puedes 

 Island and described by Van Denburgh and Slevin (1921«) as caniis, 

 intergrades with it through the population of reticulated race- 

 runners on the geographically intermediate South San Lorenzo Island- 

 Because of the intergradation of canus "with tessellatus through the 

 whiptail of Smith Island, both canus and inartyrls are regarded as 

 subspecies of tessellatus. 



Diagnosis. — This form is distinguished solely by its coloration. 

 The back is always very finely reticulated or unicolor above and on 



