1905.] NATURAL SCIENCES OP PHILADELPHIA. 473 



rounded eonvexly in profile when viewed from above. Eye small, 

 superior, anterior, and eyelid not developed. Mouth broadly convex 

 inferior, and in profile tip of mandible would fall in first f of space be- 

 tween tip of snout and front of eye. A band of fine teeth in each jaw, 

 none on roof of mouth or on tongue. Tongue broad, smooth and little 

 free in mouth. Two large nasal cavities on side of snout in front of 

 eye near together, and nasal barbel originating on frenum between. 

 Nasal barbel about equal to ventral or reaching for about first f of 

 length of head. Maxillary barbel rather thick at first and reaching 

 about first third of depressed pectoral. Outer mental barbel nearly 

 as long. Inner mental barbel a little over half length of outer. Inter- 

 orbital space flattened. Occipital process not forming a complete 

 bony bridge to spinous process of dorsal. 



Gill-openings inferior, well separated by a broad isthmus, and ex- 

 tending forward about opposite to eye. Rakers about 1 + 7, slender, 

 pointed, moderately long, and much shorter than filaments. Branchi- 

 ostegals 7, upper clavate. 



Skin smooth, on head and along lateral line more or less papillate, 

 especially former anteriorly. Lateral line complete and median in 

 depth of body along side. 



First dorsal inserted al^out first third of total length of fish, spine 

 robust and about f of its own length when combined with adipose-like 

 prolongation, and smooth. When depressed it reaches about f of space 

 to origin of adipose fin. Adipose fin large, rather high, and its base 

 about If in head. Anal high, its origin a trifle in advance of that of 

 adipose fin and when depressed its length a little more than that of 

 dorsal. Pectoral a little longer than dorsal, and spine robust with 

 posterior margin coarsely serrate, with an adipose-like prolongation. 

 When depressed not quite reaching opposite postei'ior basal margin 

 of dorsal, though beyond origin of ventral. Ventral not quite reaching 

 origin of anal. Vent well forward or close behind roots of ventrals. 



Color in arrack dusky-brown, forming about five blotches trans- 

 versely on body, and mostly above. First included in head, second 

 below dorsal, third below adipose fin, fourth on caudal peduncle at 

 base of caudal and fifth on caudal distally. These all connected along 

 middle of side of body by isthmi of same color. Dorsal dusky-brown. 

 Adipose fiji largely dusky-brown. Caudal except as noted whitish, 

 and tip of each lobe same. Ventral and anal whitish, except a small 

 dusky blotch on each medianly. Pectoral with spine whitish, fin other- 

 wise dusky. Lower surface of body, including head and abdomen prin- 

 cipally, whitish. Paler areas on upper surface of body brownish-white. 



