and Batrachians from Ecuador. 459 



[Of the genus Lioceplialus five species, two of wliich are 

 recent additions to science, are known from Ecuador. They 

 may be distinguished in the following way : — 



I. Ventral scales smooth, or nearly so. 



1. Palpebral shields small ; all the head- 



shields keeled. 



Dorsal scales large, very strongly keeled ; 

 three of them, taken from the middle 

 of the side, correspond to the ver- 

 tical diameter of the ear-opening . . ornatus, Gray. 



Dorsal scales moderate ; four of them 

 correspond to the vertical diameter 

 of the ear-opening trachyeephalus, A. Dum. 



2. A series of broad palpebral shields ; 



head-shields smooth, or slightly keeled. 



Front edge of the ear slightly toothed ; 

 scales of the lower surface of the tail 

 strongly keeled iridescens, Gthr. 



Front edge of the ear rather strongly 

 toothed ; scales of the lower surface 

 of the tail feebly keeled formosm, Blgr. 



II. Ventral scales very strongly keeled; head- 



shields large acxdeatus, O'Shaughn.} 



8. Ameiva sexscutata^ Gi\\\\ 

 Tanti. Two specimens ( ? and h.gr.). 



9. Cercosaura Gaudichaudi (Dum. & Bibr.). 



Five specimens from Hac. Olalla, plain of Tumbaco (8490 

 feet), three from Chillo (9000 feet), and one from Pichincha 

 (11,000 feet). 



10. Proctoporus unicolor (Gray). 



Three specimens from Hac. Olalla, and four from Chillo. 

 A small median occipital shield is frequently present. 



11. Am-pMsbmna fuliginosa^ L. 

 One specimen from Guayaquil, and another from Tanti. 



Ophidia. 



From the interior of Ecuador Mr. Whymper obtained only 

 two snakes, belonging to two species, viz. Liophis alticolus 

 and Leptognathus nehulatus ; and he observes : — '^ The most 

 intelligent persons I could question declared that snakes did 

 not exist ; and the surprise and curiosity which these two 

 specimens excited amongst the natives showed that they were 

 rare." In his paper on the reptiles collected by the Orton 

 expedition Prof. Cope mentions no less than nine species of 



