Number 22. February 10, 1916. 



OCCASIONAL PAPERS OF THE MUSEUM OF 

 ZOOLOGY 



UNIVERSITY OF MICHIGAN 



AniN AuiiOK, AIiciiiCAN. Published by the University, 



DESCRIPTION OF A NEW GENUS AND SPECIES OF 

 LIZARD FROM BRITTSPI GUIANA. 



By Alexander G. Ruthven. 



Two specimens of a lizard which is apparently undescribecl 

 are in the collections made by the Bryant Walker Expedition 

 to British Guiana in the summer of 1914. The form belongs 

 to the family Teiidae and is evidently nearly related to the 

 genera Iphisa and Tretioscincus, but it differs from both of 

 these genera sufficiently to warrant its recognition as the type 

 of a new genus. 



Calliscincopus, new genus. 



Description : Habit of Tretioscincus. Tongue rather 

 elongate with sagittate head and bifid tip. Head with large 

 regular shields. Anterior nasal plates separated by a fronto- 

 nasal. Praefrontals small, widely separated, the frontal and 

 frontonasal plates forming a suture. Frontoparietals present. 

 Nostril in lower part of a semidivided nasal. Limbs well de- 

 veloped, inner finger rudimentary, clawless. Ear exposed. 

 E)^elids with well developed lids, the lower with a transparent 

 disk. Dorsal and lateral scales smootli, imbricate, rounded, 



Scientific Papers of the University of Michigan No. 23. 



