106 PROCEEDINGS OF THE ACADEMY OF 



mens there is a difference in the degree of elongation of the body to the fol- 

 lowing amount : In the stouter, the length to axilla enters 2§ to groin ; in the 

 more slender 2|; in the former the width of head goes 5 times in length to 

 groin ; in the latter 6-25 times. There is no axillary costal fold ; the inguinal 

 is not marked ; the plica; do not extend on the back (where there is a faint 

 median groove), but are distinct on the belly ; tail annulate. The feet are 

 very wide and the toes short, but not so much so as in S. cephalic us. 

 The inner digit is developed on both feet, though short, especially the poste- 

 rior; the outer is also larger than in the species just named. The toes are 

 thickened at the extremities. The hind limb extends over 6-5 intercostal 

 spaces from groin. The gular fold is well marked, while the longitudinal 

 post-orbital groove is not or scarcely visible. The upper lip is slightly trun- 

 cate, and with small subnareal angles. 



The color is black as a ground, less obscured below, where it, however, va- 

 ries to brown. The gular region splotched or speckled with gray. 



The sides of the body with the tail are splotched lichen-like with light gray, 

 the same sometimes covering the dorsal region. In one specimen there is a 

 pale red dorsal band. Head black. 



Measurements. 

 No. 6340, Type. 



Inches. 



Length from snout to gape -IS 



" " axilla -59 



" " groin 1"V5 



" " end vent ... 2. 



" " " tail 3.5 



" forelimb _ -42 



" " foot -12 



" hind limb -433 



" " foot -16 



Width head -3 



" body at sacrum '18 



Like other Mexican Spelerpes this animal seems to pass its metamorphoses 

 early; a young one sent with the adults measures 21 lines in length. The 

 largest specimen measures 4-4 inches. 



This species, according to Sumichrast, is confined to the Alpine region, in 

 Vera Cruz, Mexico. In life, the light tints are of a pale yellow. 

 No. 6340, 6 specimens, Orizava, Mexico, Pr. Fr. Sumichrast. 



Spelerpes cephalicus Cope. 

 Proc. Acad. Nat. Sci. Phila. 1865, 196. 

 N. E. Mexico. 



Spelerpes chiropterus Cope. 



Proceed. Acad. Nat. Sci. Phila. 1863, p. 54. Spelerpes orculus Cope, Proc. 

 A. N. S. 1865, 196, and 1866, p. 132. 



N. E. Mexico. 



Spelerpes multiplicatus Cope. 

 Species nova. 



This small species resembles in general proportions Hemidactylium s c u- 

 tatum. It is well characterized in this geuus by its numerous costal plicffl, 

 and thickened, scarcely compressed tail. 



The width of the head enters the length to the groin 6-'75 times ; the length 

 to axilla enters thrice. The hind limb extended passes six intervals from the 

 groin; the foot is wide, and the toes short, especially the inner and outer; 

 the inner has but one minute joint free. The same may be said of the ante- 

 rior digits. The tail is compressed a little, and considerably thickened ; in 



[May, 



