THE BATRACHIA OF NORTH AMERICA. 



55 



line, in three series, much as in A, punctatum. The central is a double 

 arc. The lateral series are not so tar forward, or pass more obliquely 

 backwards, so that their extreme end is even behind the convexity of 

 the central series, not anterior to it. The lateral series is about half the 

 length of the central, with a decided interval. 



In alcohol the general color is a livid black. There is a dorsal series 

 of transverse light slate-colored bands, which widen at each end into a 

 V on the back, but are more linear on the tail. These vary In number; 

 about seven on the body and as many on the tail; sometimes more or 

 less; sometimes confluent with those before and behind them; some- 

 times interrupted in the middle. They do not descend one third the 

 depth on the sides, being confined abruptly and well defined to the 

 dorsal region. There is a similar patch on the snout. 



Measitrements. 



Inches. 



Totallength 3.80 



Length of month .30 



Length to gnLir fold .53 



Lengt li to fore leg 60 



Length to hi nd leg 1. 90 



Inchefl. 



Length to tail 2. 35 



Length of tail 1.50 



Width of head 45 



Length from elbow .45 



Length from knee .55 



The principal difference in form and structure between tliis species 

 and A. punctatuni are seen in the absence of any dorsal furrow, and a less 

 prominence of that on the side of the tail. The limbs are more feeble, 

 the head narrower, the tail shorter, etc. 



Ill specimens from Prairie Mer Rouge, 4033 f the body is thicker and 

 more clumsy, the legs weaker, the toes shorter than in Pennsylvania 

 specimens. The teeth, too, appear more transverse, and there is little 

 or no interval between the middle and lateral combs. 



This species is found in drier ground than is congenial to most sal- 

 amanders. I have taken it in the sandy regions of New Jersey and 

 Delaware. 



Fig. 8. Amhhiutnmn opanmi GrnvoT\hoTfit.. O-loncosto.r, Va, 



