720 AMPHIBIA SALAMANDRIDiE. 



parotid region; cervical fold, fold behind the eye and connecting groove, costal furrows, 

 and fnrrows in the anal and oaadal region, as in A. punctatum ; dorsal longitudinal 

 groove less marked than in that species, but still distinct ; eyes small yet prominent ; 

 nostrils minute. Total length at loss of branchiaj, 2 1-6 inch ; length, 3^ inches ; tail, 1^ 

 inches ; body, 2 inches; head to cervical fold, i inch ; diameter of body, i inch ; diameter 

 of head, 15-16 inch. 



Habitat, Massachusetts, New York, Pennsylvania and Florida, to Texas, Wisconsin, 

 Michigan and Ohio. 



Cope says, " The principal difference in form and structure between 

 this species and A. punctatum is seen in the absence of any dorsal fur- 

 row, or a less prominence of that on the side of the tail. The limbs are 

 more feeble, the head narrower, etc." In the eight specimens before me, 

 however, all of which came from Southern Illinois, the dorsal groove is 

 very distinct. In a specimen from Ann Arbor it is barely visible. In 

 these the most prominent mark of the species is its color, which diflEers 

 very strikingly from that of A. punctaium. 



Mann * states that this animal lays its eggs in the beds of small ponds, 

 and in some cases the number of these amounts to one hundred and eight. 

 He found them in this situation in summer, and also in November, and 

 always with the male and female curled up over the eggs as if in the pro- 

 cess of incubation. 



Amblystoma tigeinum Green. 



The Tiger Salamander. 



Salamandra tigrina, Grebn, Harlajst. 



Salamandra ingena. Green. 



Salamandra lurida, Sagek. 



Triton tigrinus, Holbrook, DkKay. 



Amblystoma episeopus, Hallowbll, Baird. 



Amblystoma luridum, Baird, Hallowell. 



Amblystoma tigrinum, Baird, Cope, Jordan. 



Color in alcohol varying from brown to lurid above, plumbeous 

 and yellowish white below, the yellowish white in blotches, be- 

 tween the brown and plumbeous, sometimes connected longitudi- 

 nally ; spots varying from reddish brown to white, yellow iu fresh 

 specimens, extending from the head to ths tail, and scattered ir- 

 ngulavly; tail, oval; body cylindrical in some, in others thickest 

 in the middle and tapering both ways; head depressed; muzzle 

 round ; skin smooth, with numerous mucous pores ; gular fold and 

 fold behind the eye, with connecting parotid ridge : costal 

 Fig. 4. Ambly- fanows eleven strongly marked, and others becoming indistinct; 

 stoma tigrinum, fyixTOvre behind the legs gradually ceasing, so that the tip of the 

 mouth open. ^^jj jg smooth ; back with a longitudinal groove ; tail without any 

 indications of lateral furrows ; eyes prominent ; nostrils small, distinct ; plantar tuber- 



* Smithsonian Reports, 1854, page 294. 



