148 BULLETIN 34, UNITED STATES NATIONAL MUSEUM. 



Measurements of No. 9447. 



M. 



Totalleugth 0625 



Leugth of head and body 034 



Leugth to groin 0314 



Leagth to axilla 0045 



Length to lice of rictus oris -. 0065 



Leugth to line of eye 003 



Length of fore-leg 0095 



Length of fore-foot 0032 



Length of hind leg 0095 



Length of hind foot 004 



Width of head 0077 



Width between eyes 0025 



Color above, imiform dark reddish brown ; below, uniform light brown. 

 I have seeu but one specimen of this species, as follows: No. 9447; 

 California ; Dr. J. G. Cooper, collector. 



PLETHODON OKEGONENSIS Girard. 



Cope, Proc. Ac. Phila., 1869, p. 100; Boulenger, Cat. Batr. Grad. Brit. 

 Mus., ed. II, 1882, p. 54. 



Ensatina eschscholizii, Gray, Cat. Batr. Grad. Brit. Mus., ed. i, p. 48 {nee Triton ensatus, 



Eschsch.). 

 Heredia orcf/onensis, Girard, Proc. Ac. Phila., 1856, p. 235, and U. S. Expl. Exped., 



Herp., PI. I, lig. 18-25; Strauch, Salain., p. 76; Hallow., Proc. Ac. Phila , 1856, 



p. 235. 

 Plethodon ensatus, Cope, Proc. Ac. Phila., 1867, p. 167. 



This species may be readily known by its relatively short and slender 

 tail, its long, well-developed limbs, and wide head, as well as by its 

 delicate coloration. 



The form of the body is rather depressed, with distinct head and tad. 

 The width of the head enters the length to the groin in the largest in- 

 dividuals 5.33 times; in those of medium size, 4.5 times; in the young 

 of 17.5 lines in length it enters 3.5 times. Costal folds 11, the an 

 terior indistinct or wanting, the posterior more than usually oblique, the 

 inguinal extending forwards and u])wards one space in advance of the 

 origin of the femur. The limbs appressed overlap, so that the fingers reach 

 the bases of the toes. There is no vertebral groove. The tail is sligbtly 

 compressed, more distinctly so towards the extremity, and, what is excep- 

 tional and characteristic of this species and the P. croceater, most so in- 

 ferioily, leaving the ui)per outline flat for the proximal two-thirds the 

 length. The postorbital fold is well marked and continues into the 

 transverse fold of the throat. The head is oval, and without canthus 

 rostralis; the muzzle rather thick, and with a subinferior truncation, 

 which is not so marked as in P. croceater. The nostril is terminal and 

 nearer the orbit than the diameter of the eye fissure. The latter enters 

 the width between the anterior canthi of the same 1.33 times. 



The inner uares are very small. The vomerine arcs curve backwards 



