CADUCIBRANCHIATA. 89 



apering rapidly, one-fifth longer than the distance from 

 muzzle to posterior of anus. 



Lenth 3 inches. Head to gular fold 3 4-5 lines. 



Tail 1.9 " Breadth of head 3 



Habitat Mexico. 



Spelerpes cephalicus, Cope. 



Very much resembles the preceding, of which it is 

 probably a variety ; without seeing a specimen, the only 

 points of difference seem to be the prolongation in this of 

 the vomerine teeth outwardly beyond the inner nares, 

 the short and stouter form, and the marbling of the gu- 

 lar region. 



Habitat Table Lands, Mexico. 



7. Spelerpes leprosus, Cope. 



Color black above, brown below ; sides and gular re- 

 gion licheniform, spotted, with pale yellow which 

 changes to gray in alcohol; head broad; muzzle short 

 truncate; vomerine series prolonged externally beyond 

 the inner nares, touching medially, but not contiguous 



