BATRACHIAURODELA. 11 



attached by an elongated central pedicle, and free upon its poste- 

 rior third. Eyes large. Limbs slender; anterior ones, longest; 

 four fingers; five toes, all free, tapering. Tail subcylindrical, 

 slightly compressed, tapering towards the tip. Skin, exteriorly 

 sni.ooth and soft. 



SYN.—Heredia, Grd. Proc. Acad. Nat. Sci. Philad. VIII, 1856, 140. 



Observ. — No genera are more alike in their external aspect than 

 Heredia and Anaides. To distinguish them we must have recourse to 

 the anatomy of the buccal cavity, although, one might recognize them 

 on a profile view of the head, where the cleft of the mouth would 

 become an important feature. 



Heredia oregonensis, Girard. 

 (Plate I, figs. 18-25.) 



Car. spec. — Plicatura suhcoUo nulla. Cauda suhcyUndrica, gradatim 

 minuente, quam corpus et caput simid sumpta longiore. Palmarum 

 H 'plantarum dlgitis tenuihus et dlstinctls, interlorihus perparvis, 'Cute 

 Icevi. Colore supra fasco ; infra clariore. 



Spec. Char. — No fold of the skin under the neck. Tail, subcylin- 

 drical, tapering, longer than the body and head together. Fingers 

 and toes slender and free ; inner one very small. Skin, smooth. 

 Color uniform dark-brown above, lighter beneath. 



SY^.—Hiredla oregonemu, Grd. Proc. Acad. Nat. Sci. Philad. VIII, 1856, 141. 

 —Hallow. Proc. Acad. Nat. Sci. Philad. Vllt, 1856, 235. 



Descr. — In its general physiognomy this species resembles strik- 

 ingly, Anaides lugnhrls. It has the same general shape of the head, 

 neck, body, and limbs ; but the callous termination of the toes is 

 much less developed. 



The head is quite prominent, depressed ; its upper surface sub- 

 concave ; elliptical in outline, when seen from above. The snout is 

 thick and subtruncated, overlapping the lower jaw. The nostrils are 



