OPHIOMORPHA. 133 



fiulz about 160, of which the first 50 and last 20 only form 

 complete circles ; posterior extremity of the body round- 

 ed at the end; scales small, numerous, and imbricated; 

 color yellowish below and grayish above. 

 Habitat Mexico. 



Siphonop» syiitreuius, Cope. 



Muzzle depressed, projecting, rounded in front; man- 

 dibular teeth five on each side and large; annuli about 

 130, complete, and with intermediate, lateral segments 

 on the posterior third of the body; annuli ventrally in- 

 terrupted in front and the segments becoming complete 

 circles behind; posterior extremity of the body with a 

 depressed, pointed terminus; body as a whole slender, 

 cylindrical; eyes very small, barely visible; postgular 

 and gular folds present; nostrils open internally at some 

 distance behind the palatine arch ; color dark, plumbeous 

 with yellow lines upon the annuli; length one foot; di- 

 ameter y^ of an inch ; " Differs from the four species hith- 

 erto known by the close approximation of the narial and 

 tentacular openings; the latter lie a little behind the form- 

 er, and are slightly larger. * * * It resembles C. 

 ochrocephala, from which it is distinguished by position 

 of the foramen and inner nares, also by color and char- 

 acter of annuli." Cope, (24, e.) 



Habitat Belize. 



Siphonops Brasiliensis, Lutk, and Siphonops indis- 

 tinctus, Lutk, are both unknown to the writer. 



Habitat Brazil. 



