1885.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 209 



Vol. Till, No, 14. Washington, D. €. June 8, 188 J. 



nary type, color plain blackish gray, without markings, the lower i)arts 

 scarcely paler; no reddish shades. 



Few specimens of this species have been studied, and only one has 

 been recorded of less than 100 i^ouiids weight, so far as 1 remember. 



It is evident that this species has no special relation to the Great Jew- 

 fish or Guasa {Promicrops itaiara). Its nearest relations seem to be with 

 T^.pinephehis morio. Not having seen specimens of the two at all simi- 

 lar in size, it is hard to decide as to how near these relations are. The 

 most obvious differences are in color, in the more robust form of U. ni- 

 gritus, and in the much greater concavity of the caudal in E. morio. 



Dr. Bean, who has examined the young of E. nigritus, regards it as 

 very distinct from the young of E. morio. 



Indiana University, April 1, 1885. 



DESCRIPTION OF A NEW SPECIES OF AMBLYSTOMA (AMBLY- 

 STOMA COPEIANUM) FROM INDIANA. 



By O. P. HAV. 



The specimen on which the following description is based was found 

 dead and somewhat mutilated. The injury that it has suffered does 

 not, however, in anyway obscure the characters of the species, amount- 

 ing, as it does, only to a loss of the entire left fore-limb and slight fract- 

 ures of a few of the bones of the anterior part of the head. 



The head is large, somewhat wider tha^u the body, and flattened; the 

 body short, and the tail long and compressed. The skin is, for the most 

 part, smooth, but everywhere, as seen under a lens, is pitted with the 

 openings of the cutaneous follicles. Of these, there are a few enlarged 

 ones in a band surrounding the orbit and extending forward to the 

 nostril. Others are found above the angle of the jaw, and a few still 

 larger ones on the posterior border of the parotid region. The prom- 

 inent keel, and the whole tip of the tail are so richly provided with en- 

 larged pores as to present a gr? nulated appearance. 



The width of the head is somewhat greater than that of the body. It 

 is possible that the brcradth and flatness of the head have been exag- 

 gerated somewhat by the injuries that it has received ; but ti is can be 

 true only to a very slight extent. The breadth is about the san e at the 

 angle of the jaw and the corner of the mouth. From the former point 

 the head tapers backward, the outline being concave to its posterior 

 border, where it is suddenlv constricted into the neck. From the cor- 

 ners of the mouth the head tapers forward to nearly opposite the nostrils, 

 beyond which it is rapidly rouuded to form the snout. The width of 

 Proc. Nat. Mus. 85 14 



