330 Alexander G. Eüthven, 



head in tlie specimeiis of C. serpentina tliat we have examiiied is 

 not as uniformly colored as in C. rossignonii, being generally much 

 striped and spotted witli black or very dark brown. 



The largest specimen obtained was simning itself on a rock in 

 the Hueyapam River, near the village of San Juan. The other two 

 were removed from the stomach of a large gopher snake {Spüotes 

 corias couperü) taken on the shore of a pond in the cane fields. 



