720 AMPHIBIA—SALAMANDRIDA. 
parotid region; cervical fold, fold behind the eye and connecting groove, costal furrows, 
and furrows in the anal and caudal 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 branchia, 2 1-6 inch; length, 3} inches; tail, 14 
inches ; body, 2 inches; head to cervical fold, 4inch; diameter of body, 4 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 aspecimen from Ann Arbor it is barely visible. In 
these the most prominent mark of the species is its color, which differs 
very strikingly from that of A. punctatum. 
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 TIGRINUM Green. 
The Viger Salamander. 
Salamandra tigrina, GREEN, HARLAN. 
Salamandra ingens, GREEN. 
Salamandra lurida, SAGER. 
Triton tigrinus, HOLBROOK, DrKay. 
Amblystoma episcopus, HALLOWELL, 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 in fresh 
specimens, extending trom the head to the tail, and scattered ir- 
regularly; tail, oval; body cylindrical in some, in others thickest 
in the middie 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 
Fie. 4.—Ambly- farrows eleven strongly marked, and others becoming indistinct; 
stoma tigrinum, furrows behind the legs gradually ceasing, so that the tip of the 
mouth open. —t¢aij is smooth; back with a longitudinal groove; tail without any 
indications of lateral farrows; eyes prominent; nostrils small, distinct; plantar tuber- 
ais 
* Smithsonian Reports, 1854, page 294, 
