THE BATRACHIA OF NORTH AMERICA. 



177 



little below tbe level of tlie jaw, looking like a fang when viewed later- 

 ally. Viewed from in front, the lower outline of the muzzle is strongly 

 concave, bordered on each side by the downward extension of this 

 ridge. There is a slight indentation of the side of the jaw behind this 

 ridge, and there is a fine linear channel leading down the back of this 

 ridge from the outer margin of the external nostrils. A similar chan- 

 nel, but no ridge, is seen in P. ruber. 



The outline of the upper jaw, as viewed from below, is decidedly an- 

 gular anteriorly instead of rounded. 



The eyes are unusually large and prominent for this section of sala- 

 manders, and are separated anteriorly by little more than one orbit's 

 length. The two parasphenoidal ranges of teeth are in contact ante- 

 riorly, as in S. r. montanus, without the interval of S. r. rtiber. 



There are fifteen costal furrows, excluding an axiliary one. The tail 

 is a little more than half the rest of the bodj^ 



In alcohol the color is light brownish-red, paler beneath; the upper 

 parts and sides thinly but quite uniformly sprinkled with small, 

 rounded, well-defined, blackish dots; very few of them on the head. 



As stated, this variety is distinguished from S. ruber, as well as 

 S. r. montanus and sticticeps, by the shape of the head, the angulation 

 of the upper lip, the much larger and more approximated eyes. The 

 scantiness of the black specks is more as in S. r. montanus, from which 

 again it is distinguished by fifteen instead of sixteen costal grooves. 



Proi^ortional dimensions. 

 Head : 



Width to distance from snout to groin about 6 times. 



From snout to gnlar fold contained in distance from snout to 



groin about 4i times. 



Distance anteriorly between eyes in length of orbit. .. scarcely more than once. 



Distance from eyes to nostrils in length of orbit about once. 



Distance between external nostrils in length of orbit about one time. 



Limbs: Distance between outstretched toes in length from 



snout to groin rather more than half. 



Body: Number of costal furrows (including inguinal) .„. 15 



Measurements, in inches. 



Length, measured along axis of body : 



From snout to gape 22 



From snout to gular fold 45 



From snout to armpit 65 



From snout to groin 1. 85 



From snout to behind anus 2. 10 



From snout to end of tail 3. 30 



Tail 1.20 



Head : 



Width of head 30 



Length of orbit 11 



Distance between ej\^s anteri- 

 orly 13 



Distance between outer nostrils . 11 

 1951— Bull 34 12 



Head—Continued : 



Distance between inner nostrils . 08 

 Distance from eye to nostrils.. .10 

 Body: Distance between armpit 



and groin 1. 17 



Tail: Height of tail where highest .20 

 Limbs: 



Free portion of longest finger.. .08 

 From elbow to tip of longest 



finger 30 



Free portion of longest toe 10 



From knee to tip of longest toe .35 

 Dista'M'e between outstretched 

 toes 1.05 



