CADUCIBRANCHIATA. 5 1 



nearly circular; eyes very large and prominent; neck 

 constricted; limbs large; digits long, linear, and not tri- 

 angular; costal furrows eleven. 



Length 7.2 inches. Head to cervical fold .95 inch. 



Tail 3.4 " Breadth of head % " 



Habitat, Puget's Sound. 



17. Amblystoma aterrimum, Cope. 



Color above black, plumbeous beneath ; body strong ; 

 tail short, upper edge and posterior half compressed; 

 head oval, broad; tongue large, as broad as long ; vomer- 

 ine series of teeth in two groups, beginning behind the 

 inner nares, passing in a curve to the anterior, then turning 

 towards the median line at a right angle to their pre- 

 vious direction ; nares equidistant ; cervical fold promi- 

 nent; parotid mass or ridge invisible ; costal folds twelve, 

 indistinct; limbs strong; palms wide, toes short, de- 

 pressed. 



Length 6y 2 inches. Head to cervical fold 123^ lines. 



Tail 2^ " Breadth of head 9^ 



Habitat Northern Rocky Mountains. 



