BARBOUR: VERTEBRATA OF GORGONA ISLAND. 101 



COLUBRID^. 



8. Spilotes guentheri (Blgr.). 



S. or^us Bocourt. Guntli. Biol. C.-Amer. Kept. p. 118; pi. xliv (1894). 



A single large specimen, with only a short stump of tail present, and with the 

 yellow spots ou the scales very irregularly arranged. 



9- Leptophis occidentalis insularis, subsp. nov. 

 Type. — Mus. Comp. ZoiJl., No. 6,985, adult, Gorgona Island, one spechnen. 



This island race is different from the continental form in that there are 

 several dark brown or black spots, or short wavy lines, on each side of the 

 carina of each scale. This carina is characteristically dark-colored. The scales 

 on the tail are dark-edged ; and this condition gives a reticulate condition. 



10. Leptodeira albofusca (Lacfp.). 



23 

 A single example of this common species, with scales is the only 



174 + 7o ■' 



one which Mr. Brown captured. 



11- Lachesis lanceolatus (Lacep.). 



Two young specimens, typically colored, have their scales arranged as fol- 



97 

 lows : the smaller is 312 + 51 mm. in length, scales '^ ; the larger is 



Lao "T 00 



25 

 369 -f- ? mm. long, scales 



195 + 



Amphibia. 



RANIDAB. 

 12. Prostheraspis femoralis, sp. nov. 



Types. — Mus. Comp. Z06I, No. 2,422, Gorgona Island. Twenty-two speci- 

 mens, all apparently adult. 



Apparently closely related to P. inguinalis Cope. It differs in coloring and 

 proportions. The tibio-tarsal articulation reaches somewhat beyond the eye. 

 Tlie color is gray above, sometimes with faint brown marblings. Below paler 

 gray, frequently with rich markings of deep chocolate brown, these particularly 

 abundant under the chin. 



