1903.] NATURAL SCIENCES OF PHILADELPHIA. 347 



rather thin lips. Teeth minute, and in rather narrow bands in the 

 jaws, and on the vomer and palatines. Tongue thick, broad, rounded, 

 and free in front. Nostrils close together, the anterior circular, 

 directed forward just above the lip, and the posterior elongate with a 

 small flap. Interorbital space convexly elevated, with a median 

 depression giving place to the fontanelle. The fontanelle does not 

 extend beyond the eyes, but runs back to the occipital process as a 

 narrow median groove. Maxillary barbels broad, flattened, and 

 reaching to the anus. Mental barbels short, two in number, and 

 reaching a little beyond the gill-membrane where it crosses the 

 isthmus. 



Gill-opening extending forward nearly opposite the posterior margin 

 of the eye. 



Peritoneum pale. 



Anus about the last third in the space between the origin of the 

 ventral and that of the anal. 



Skin smooth, the top of the head posteriorly, and the occipital 

 buckler rather rugose. Humeral process smooth. Lateral line with 

 many rather long straight and obliquely vertical branches running out 

 above and below. The lateral line itself is continued well out on the 

 basal portion of the caudal. 



Origin of the dorsal nearer the tip of the snout than the origin of 

 the anal, the spine straight, with a rugose edge in front becoming 

 barbed above, and giving place above to a long compressed broad fila- 

 ment that reaches near the base of the caudal. Dorsal rays graduated 

 from the first, which is much longer than the spine, to the last, which 

 is a little over a third the length of the spine. Adipose dorsal much 

 higher than its base, and inserted much nearer the base of the caudal 

 than the base of the last dorsal ray. Anal with a sHghtly concave 

 margin, the first developed ray the highest, and the origin much nearer 

 the base of the caudal than the origin of the dorsal. Pectoral with 

 a long compressed spine, rugose along the edge at first, and both edges 

 barbed distally. When depressed the spine reaches three-fourths the 

 distance to the ventral, and its extremity gives place to a long com- 

 pressed filament reaching the origin of the anal. First pectoral ray 

 longer than the spine, and the others graduated to the last which is 

 about a fourth the length of the spine. Ventral broad, rounded, the 

 spine more or less flexible, and reaching the anal fin. Caudal large 

 deeply forked, and the lobes long, rather slender and pointed. 



Color in alcohol grayish above, white below. Lower side with 

 crowded gray dots. The outer lower surface of the pectoral with 



