1914.1 



NATURAL SCIENCES OF PHILADELPHIA. 



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profile generally ovoid. Caudal peduncle compressed, its length 

 I its least depth. 



Head large, broad, upper profile convex, more inclined than 

 lower. Snout short, broad, convex over surface, its length about 

 half its width. Eye large, circular, elevated, without free edges, 

 and slightly anterior. Mouth broad, terminal, rather low, and 



Fig. 1. — Lethotremus mcalpini Fowler. (Type.) 



broad fleshy lips similar. Jaws equal. Maxillary extends but 

 slightly beyond front edge of eye. Dentition as a trenchant firm 

 cutting-edge in each jaw, similar throughout most its extent, and 

 edge only feebly notched or with but slight dentate appearance. 

 Apparently no other teeth, though upper surface of mouth and 

 tongue covered with small tubercles. Tongue large, broad, thick, 



