474 PROCEEDING,^ OF THE NATIONAL MUSEUM. vol.50. 



Head 3| in total length, 1| in length to anus; depth 6 J and 2f in 

 same; orbit 3^ in head; snout 2§; interorbital width 4^; maxillary 

 3h; mandible 2f ; distance premaxiUary to tip of snout 3; maxillary 

 to lower edge of orbit 6; barbel 3 § in eye; D. II, 8-96; A. 99; P. 19; 

 V. 7; branchiDstegals 6. 



Snout produced, its length slightly greater than the diameter of 

 the large orbit, which is one and two-fifths times as long as wide; a 

 strong lateral ridge running from the very acute snout nearly to the 

 produced angle of opercle, which overlaps the interopercle completely 

 and is as far from orbit as length of snout; the lateral ridge is double- 

 crested from below center of eye backward; a central row of spinous 

 plates on upper surface of snout, forming crest and extending to 

 above anterior margin of orbit without formmg a prominent ridge; 

 a supraorbital ridge follows around the orbit in front and is con- 

 tinued by a low row of scales on lower orbital edge, and also by a low 

 ridge in front of nares; posteriorly it is continued by a strong spinous 

 ridge running parallel to suborbital ridge and reaching upper angle of 

 giU opening; a pair of ridges on occiput, beginning above center of eye, 

 separated by a distance equaling three-fifths interorbital space, and 

 extending backward to nape with very slight divergence; a strongly 

 spmous plate midway between terminations of occipital and of 

 supraorbital ridges, situated, however, on body rather than head; 

 no ridges, scales, or spines present below suborbital ridges, save a sharp 

 spur on mandible at articulation; maxillary ending under center of 

 eye; preopercle strongly produced backward, overlapping inter- 

 opercle; opercle ending in a stiff spme; teeth in small cardiform bands, 

 somewhat larger above and in more series, about four or five above 

 and three below anteriorly, very slightly if at all enlarged externally; 

 first gill slit as long as one-third orbital diameter. 



Dorsal inserted just behind pectoral base, its second spine smooth ; 

 uiterdorsal space equal to vertical diameter of eye; ventrals inserted 

 below dorsal insertion, their filamentous first rays reachmg front of 

 anal; origin of anal behind first dorsal a distance equaling base of 

 first dorsal; base of ventrals midway between origin of anal and the 

 isthmus; anus immediately before first anal ray. 



Scales present everywhere except on lower surface of head; those 

 on body (between insertion of lateral Ime and doreal) with four to six 

 divergent rows of spinules, the central rows highest and the spinules 

 longest posteriorly, latter nearly vertical in position, and making 

 body very rough; scales on flanks lacking, so that character can not 

 be given; no naked space between ventrals; 5 series of scales between 

 lateral line and middle of dorsal, 19 between anal insertion and first 

 dorsal. 



Color of all specimens fade'd, save for black peritoneum and branch- 

 iostegal membranes; fins dusky. 



