52 1. GEKKONIDM 



MocQUARD, Nouv. Arch. Mus. Paris, Ser. 4, Vol. I, 1899, p. 300; 

 CoPE.Report U.S. Nat. Mus.for 1898, 1900, p. +58, fig. 83; Ditmars, 

 Reptile Book, 1907, p. 98; Stejneger & Barbour, Check List N. 

 Amer. Amph. Rept., 1917, p. 42; Stephens, Copeia, 1921, No. 91, 

 p. 16; Stephens, Trans. San Diego Soc. Nat. Hist., Vol. Ill, No. 4, 

 1921, p. 60; Van Denburch & Slevin, Proc. Cal. Acad. Sci., Ser. 4, 

 Vol. XL, No. 4, 1921, pp. 50, 54; Nelson, Mem. Nat. Acad. Sci., 

 Vol. XVI, 1921, pp. 114, 115, 123. 



PAyllodactylus xanti Cope, Proc. Acad. Nat. Sci. Phila., 1863, p. 102 

 (type locality. Cape St. Lucas) ; Cope, Proc. Acad. Nat. Sci. 

 PhUa., 1866, p. 312; Cope, Bull. U. S. Nat. Mus., No. 1, 1875, 

 pp. 50, 93; Yarrow, Bull. U. S. Nat. Mus., No. 24, 1883, p. 73; 

 Garman, Bull. Essex Inst., Vol. XVI., No. 1, 1884, p. 12; Belding, 

 West. Amer. Scientist, Vol. Ill, No. 24, 1887, p. 98. 



Description. — Head much longer than broad. Snout 

 rounded, longer than distance between eye and ear opening. 

 Lips very prominent. Ear opening narrow, oblique. Edge 

 of eyelids rather inconspicuously dentate. Digits slender, 

 covered below with a series of transverse lamellae, terminated 

 by two large plates which are somewhat wider distally than 

 proximally. Nostril between rostal, first labial, and three 

 nasals, the upper of which is in contact with its fellow of the 

 opposite side and may be merged with the rostral. Seven or 

 six upper, and six or five lower, labials to a point under the 

 pupil, behind which are several smaller ones. Two large 

 plates behind the large pentagonal mental, followed by 

 others which become gradually smaller posteriorly as they 

 approach the small flat gulars. Top and sides of head back to 

 posterior borders of orbits covered with small, subequal 

 granular scales without enlarged granules. Rest of top and 

 sides of head, upper surfaces of limbs, neck, back, sides, and 

 base of tail with series of large, conical or trihedral, smooth 

 or weakly keeled, tubercles, separated by small granular 

 scales. Lower surfaces covered with smooth, flat, imbricate 

 scales much larger than gulars. Tail conical, somewhat flat- 



