12 University of Michigan 



long as deep, ending in an acute point; crest not wide, not 

 extending on back much beyond the level of the anal opening; 

 depth of the muscular part at base more than half the greatest 

 total depth. 



Color (in alcohol) dark brown above with darker irridescent 

 streak down vertebral region, between eyes and on either side. 

 This darker color, spotted with white, encroaches on the sides 

 of the throat. Belly yellowish white, irridescent. Muscular 

 part of tail yellowish with four well-dehned square dark spots, 

 becoming progressively smaller posteriorly, on the median line 

 above. Crests gray spotted with black, the spots larger and 

 more numerous on the posterior third of the crest. The square 

 spots may persist until the tadpole is nearly ready to transform ; 

 however, one specimen of approximately the same stage of 

 development as 52517 has them only faintly indicated and the 

 crests are immaculate. 



Mouth three-fourths bordered by papillae. Beak with wide 

 margin of black. Series of labial teeth 76, the second 

 upper series very short, the first widely interrupted in the mid- 

 dle. The first low^er series very narrowly interrupted in the 

 middle. Another specimen has only a trace of the second up- 

 per series, while a third has only one long, curving, upper ser- 

 ies, widely interrupted. 



Length of body 14 mm.; length of tail 20 mm.; width of 

 body 7 mm. ; greatest depth of tail 7 mm. ; depth of muscular 

 portion of tail at base 4 mm. 



Remarks : It is with considerable hesitancy that the writer 

 has described this form because the metamorphosed specimens 

 are probably immature. The three adults are, however, very 

 similar in structure and color and are apparently not to be 

 referred to any of the described species. Dr. George A. Boul- 



