1905.] NATURAL SCIENCES OF PHILADELPHIA. 465 



(Named for Dr. W. H. Furness, 3rd, of Philadelphia, explorer of 

 Borneo, who collected the type.) 

 15. Ompok nebuloBUS (Vaillant). 



Head Sy'V; depth 5; D. I, 4; A. 69; P. I, 13; V. 1, 10; width of head 

 If in its length, from tip of mandible; depth of head, at occiput, If; 

 length of dorsal 2 ; of lower caudal lobes ly\; of pectoral If : of ventral 

 3^; depth of caudal peduncle 6^; snout 2f in head, from tip of upper 

 jaw; maxillary 2^; width of mouth 1|; interorbital space 2; eye 6|- 

 in interorbital space; base of anal 2 in total length of fish. 



Body elongate, compressed, greatest depth about origin of anal, and 

 upper profile of back nearly straight from occiput to caudal. Ijower 

 basal profile of anal gradually sloping up to narrow caudal peduncle. 



Head broad, depressed in front and becoming conic posteriorly. 

 Upper profile slightly concave. Anterior margin of head when viewed 

 from above broadly convex. Snout broad, depressed, and with convex 

 margin. Eye small, lateral, ellipsoid, a little anterior, and behind 

 corner of mouth. A deep convex fissure before lower anterior margin 

 of orbit, leaving a narrow preorbital rim. Lips thick and fleshy, with 

 thick folds at corners of mouth. Mandible well protruded. Teeth 

 numerous, sharp pointed, slender, and in rather broad uninterrupted 

 bands Avith projections in jaws. Vomerine teeth smaller, similar, in two 

 approximated patches anteriorly in roof of mouth, which is otherwise 

 smooth and edentulous. Tongue smooth, broad, thick, fleshy, rounded 

 and but little free on edges. Nostrils small, inconspicuous, and space 

 between each about equal. Anterior nostrils in short cutaneous tubes 

 near front edge of snout, their distance from posterior about ^ of space 

 between. Posterior would fall about midway in space between ante- 

 rior and front rim of orbit. Maxillary barbel long, slender, filamentous, 

 and reaching beyond tip of depressed dorsal or about first y\ of anal 

 base. Each ramus of mandible with a small thin barbel placed about 

 midway in space between nostrils, and length a trifle greater than same. 



Gill-opening extending forward about opposite space between man- 

 dibular barbels. Rakers 5 + 10, first eight just below bend also with 

 an inner prong. Several of those above bend also bifid. In form cpnic, 

 sharp pointed, firm, and length nearly ^ that of longest filaments. 

 Longest filaments a trifle more than horizontal orbital diameter, or 

 not quite equal to space between anterior and posterior nostrils. 

 Branchiostegal flaps broad, left forming a broad flap over right, and 

 radii 19. Isthmus rather broad and fleshy. 



Skin smooth, naked and without papillae. A number of pores on 

 head, small and inconspicuous. Lateral line a little high at first, and 



