CROCODILIANS, LIZARDS, AND SNAKES. 



1115 



the largest. Mental scutelLi', one pair. Body slender, tail ratber short, 

 tapering to a point. Scales subelliptlcal, considerable broader in 

 outer row. 



Ground-color of body uniform light-reddish brown; light beneath. 

 Head deep chestnut-brown; upper part of neck with a blackish-brown 

 half-ring, covering three scales in length, between which and the head 

 a narrow space of the groundcolor exists across the tip of the o(;cipitals. 



Cat. No. 1875; rows of scales, 15; upper labials, 7; gastrosteges, 113; uroateges, 

 35; total length, 205 mm. ; tail, 31 mm. 



In its distribution this species extends much farther east than any of 

 its JSTorth American congeners. A specimen is in my collection from 

 Volusia, Lake George, Florida. It is yet rare in museums. 



Taniilla voronata Baird and Uirard. 



HOMALOPSIN^. 



I. Sulcus of hemipenis undivided; flounced. 



Fusiform; internasals distinct; flounces spinous; subcaudals one-rowed, 



rrii'chix Peters. 

 Fusiform; internasals and nasals fused; flounces not spinous; subcaudals two- 

 rowed Stenorhina Dumoril and Bibron. 



II. Sulcus bifurcate; flounced. 



Hemipenis bifurcate; spines numerous; one internasal Caw /or/a Girard. 



III. Sulcus bifurcate; not flounced (Hemipenis bifurcate). 

 a. No tentacles on muzzle. 



Spines numerous ; one internasal plate ; parietals nadivided. Honialops is Kuhl. 

 Spines numerous ; two internasal plates ; parietals subdivided, 



Cerberus Ciivier. 

 aa. Tentacles on muzzle. 



Spines numerous; one internasal; parietals uudivided . . Merpeton Laccpcde. 



The above genera are the only ones which I have been able to exam- 

 ine as to their penial characters. 1 therefore give the following general 

 synopsis : 



* Muzzle with a pair of tentacular processes. 



One internasal plate ; parietals undivided Herpeton Lac<5pt>de. 



**No tentacular processes. 

 a. Scales keeled. 



(i. One internasal plate. 



Parietal plates undivided Homalopsis Kuhl. 



pp. Two internasal plates. 



Parietal plates subdivided Cerberus Cuvier. 



