187. XENOPHOLIS. 



231 



c. No well-defined markings. 



e-f. 6 (V. 170 ; C. 33) 

 &? (V.173; C. 28). 

 g. e (V. 162} 0.38). 



A. 6 (V. 171 ; C. 36). 

 i. 3 (V. 161 ; 0. 46). 

 k. (J, skeleton. 



Yucatan. 



Tapana, 

 tepee. 



Tehuan- 



Oartago, Costa Eica. 

 Yucatan. 



M. Sumichrast [C] ; 

 F. D. Godman & 

 O. Salvin, Esqrs. 

 [P.]. 



Prof. Grant fP.]. 



187. XENOPHOLIS. '^ 



Xenopholis, Peters, Mm. Berl. Ac. 1869, p. 440. 

 G-errhosteus, Cope, Proc. Ac. PMlad. 1874, p. 71. 

 Elapomorphus, part., Strauch, Bull. Ac. St. Petersb. xiix. 1884, 

 p. 549. 



Maxillary teeth 14, small, followed after a short interspace by a 

 pair of moderately enlarged, grooved fangs situated just behind the 

 vertical of the eye; mandibular teeth subequal. Head slightly 



rig. 16. 



Vertebrae of Xenopholis scalaris. 



a. Pour middle dorsal Tertebrse, seen from above. 



b. Middle dorsal vertebrse, lower view. o. Ditto, front view. 



distinct from neck ; eye rather small, with round pupil ; nasal entire ; 

 praefrontals fused to a single shield. Body cylindrical ; scales smooth, 

 without pits, in 17 rows ; ventrals rounded. Tail rather short ; 

 suboaudals in two rows. Neural spines of the vertebrae expanded 

 above, forming shields which are rugose and divided by a median 

 groove. 



South America. 



