1903.] NATURAL SCIENCES OF PHILADELPHIA. 163 



Head 2f ; depth li; D. III-25; A. 21; scales about 42 to base of 

 caudal; width of head 2 in its length; depth of head, measured verti- 

 cally over posterior rim of orbit, greater than the length of the head 

 by a little over half an eye-diameter; snout If; eye 3f ; interorbital 

 space 3f ; first dorsal spine ly^; base of soft dorsal If; base of anal If; 

 caudal 2; least depth of caudal peduncle 3i; pectoral 2f . 



Body elongate, somewhat elliptical and strongly compressed. The 

 greatest depth about the middle of its length, or in the region of the 

 base of the ventral spine. Caudal peduncle compressed and rather 

 thick. 



Head long, angular, the upper profile more or less straight, at least 

 in front, and the lower profile evenly convex. Snout long, convex 

 above, very oblique, and the cheek compressed. Eye small, high, 

 very posterior, and about two-fifths the length of the snout. Mouth 

 small, and with thick fleshy lips. Jaws nearly equal, the teeth pro- 

 truding. Teeth large, powerful, the edges sharp and notched. Nostrils 

 small, very close together, lateral and in front of the eye above. Inter- 

 orbital space, together with the space posterior to the eyes, convex. 



Gill-opening small, about two-thirds the interorbital space. 



Peritoneum black. 



Scales all very rough, those on the head and abdomen all more or 

 less in oblique rows, and those on the trunk in nearly vertical series. 

 Tubercles on the back between the dorsal fins enlarged, much larger 

 than the three horizontal series of spines on the side of the caudal 

 peduncle. A number of rather long spines between the ventral spine 

 and the origin of the anal fin. About five enlarged bones above the 

 base of the pectoral behind the gill-opening. 



Origin of the spinous dorsal about over the gill-opening, the first 

 spine very large, robust and rough on the anterior surface, second 

 spine much smaller and slender, and the third minute. The fin is 

 depressable in a groove. Soft dorsal and anal opposite, and the rays 

 all of nearly uniform height or about equal to the length of the eye. 

 Caudal broad, rather deep, and the margin straight. Pectoral broad, 

 rounded and short. Ventral spine rather long, freely movable and 

 rough. 



Color in alcohol faded more or less uniform brown. Side with a 

 deep brown band running from the gill-opening to the anterior and 

 posterior rays of the dorsal, leaving a pale area at the middle of the 

 base of this fin. Below, and running obliquely backward to the base 

 of the anal, are first one broad dark band, and then three narrower. 

 The dark band from the eye down to the base of the pectoral is distinct, 



