CADUCIBRANCHIATA. 45 



while in the glutinosus it is cylindrical or only slightly 

 compressed. The Triton -porphyria cus of De Kay is 

 probably Plethedon glutinosus. 



9. Amblystoma tenebrosum, Baird and Girard. 



Color in alcohol uniform chestnut brown, marbled 

 with darker brown, and head with a grayish tinge ; body 

 cylindrical, depressed ; head nearly elliptical ; skin cor- 

 rugated; tail short tapering, much compressed, edges 

 near the tip sharp ; limbs relatively strong ; fingers short, 

 depressed, the third longest, with a kind of bulb on the 

 under surface ; vomerine teeth in two groups, both con- 

 vex in front, uniting at a slight angle with the apex back- 

 wards ; animal as a whole "especially characterized by 

 its massive frame and huge size among true Salaman- 

 ders." 



Length 9.3 inches. Head to cervical fold ij£ inches. 

 Tail 3.65" Breadth of head 1.15 " 



Body 5.65 " Expansion between toes on 



opposite sides. 3 3-5 inches. 



Habitat Oregon. 



