334 PROCEEDINGS OF THE ACADEMY OF [April, 



95 in the lateral line to the base of the caudal, and about 6 more on 

 the base of the caudal; 10 scales between the origin of the soft dorsal 

 and the lateral line in a vertical series, and about 24 between the latter 

 and the origin of the anal; pores 50 in the lateral hne to the base of 

 the caudal; width of the head If in its length; depth of head Ijjj: 

 snout 2; eye 5f ; maxillary 2^; mandible 2^; width of mouth at cor- 

 ners 2f; interorbital space 5^; first dorsal spine 2f ; third 2^; first 

 dorsal ray 2J; first anal ray 3^; eighth anal ray 2|f; upper caudal 

 lobe 1^; least depth of caudal peduncle 4^; ventral 1^; space between 

 bases of innermost ventral rays 3f ; ventral spine 2f. 



Body rather stout, cylindrical, short in comparison, and thickest 

 anteriorly, so that the greatest depth falls opposite the fourth dorsal 

 spine. The upper profile is evenly convex from above the eyes to the 

 upper region of the caudal peduncle. Lower profile more or less 

 straight. Chest and breast flattened, and broad. Caudal peduncle 

 and posterior portion of the trunk compressed, so that the depth of 

 the former, measured from the base of the last dorsal ray, is about 

 one and four-fifths in its length. The upper and lower surfaces are 

 also somewhat fiattened. 



Head moderately large, broad and high, and its lower profile hori- 

 zontal. Snout long, broad, obhque, and the profile straight. The 

 upper jaw projects down a little beyond the anterior profile of the snout, 

 which, when viewed from above, is seen to be concave. On each side 

 broad round processes with denticulated edges are developed, and pro- 

 ject anteriorly. At the posterior outer edge of each is a small spine. 

 Eye a little posterior in the head, and impinging on its upper profile. 

 A furrow runs from the lower edge of the eye down along the front of 

 the snout to the nostrils. ^louth large, the jaws moderate, and the 

 lower inferior. Maxillary falling a httle short of the front rim of the 

 orbit, and its distal expanded extremity about two-thirds the orbit. 

 Teeth minute, and in rather broad, rasp-like bands, in the jaws. Sim- 

 ilar but smaller teeth in narrow bands on the vomer and palatines. 

 Tongue large, broad, thick, smooth, and only the small tip free in 

 front. Lateral articular region of the mandible with a short series 

 of small serrse. Nostrils anterior, near together, the anterior with a 

 little flap, and the posterior a little nearer the tip of the upper jaw than 

 the eye. Interorbital space rather narrow, a trifle less than the inter- 

 nasal space, flattened in the middle, and each side a httle elevated. 

 Top of the head very slightly convex. 



Bones of the head all with fine radiating strise. Four preocular 

 spines, the innermost the larger. Two postocular spines. Two tym- 



