74 



BULLETIN 34, UNITED STATi.« NATIONAL MUSEUM. 



another at the present time to warrant them distinct places and names 

 in the system." Dr. G. Bouleuger, in the last edition of the catalogue 

 of the species of salamanders in the British Museum 1882, has taken 

 this view of the case, and has reduced the name mavorUum to the posi- 

 tion of a synonym of tigrinum. In the present work i take the same 

 view of the relations of the Eastern and Western forms. 



The following' is a description of a specimen of the Western animal: 



Palatine teeth in a transverse series, more or less angular anteriorly, 

 reaching to the posterior border of the inner uares, or one diameter be- 

 yond; the angle sometimes flattened or rounded. The series scarcely 

 or not at all interrupted on the median line; never (?) on the limbs, 

 which are generally a little undulating. 



Inner nostrils separated by the same space as the outer ; rarely a lit- 

 tle farther apart. 



Tongue broader than long; more than half the width of the head, 

 which is fleshy. 



Body heavy, with twelve costal furrows. Head very broad, con- 

 tained about three and one-half times in distance from snout to groin. 

 Tail about equal to the same distance, much compressed from the 

 base. Males in breeding season with a distinct tin from near the base 

 of the tail above, and from beyond the middle below; tail more oval 

 at other seasons. Oloacal region of male much swollen, emarginate; 

 angular behind. 



Legs moderate; digits much depressed, very broad at base, tri- 

 angular, and adapted for swimming. Free portion of digits about 

 one-third the distance from their tips to elbow or knee. 



Pig. 13.— Amblystoma tigrinum Green, No. 4059. Natural size. FortEipley, Minn. 



General color dark brown or blackish, in alcohol, varied with blotches 

 of yellow. These are disposed along the median line of the back and 



