1905.] 



NATURAL SCIENCES OF PHILADELPHIA. 



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anterior, and distinctly behind corner of mouth. A deep fissure before 

 and below eye leaving a narrow preorbital rim. Teeth fine, sharp 

 pointed, and in rather broad bands in jaws without backward projec- 

 tions. Vomerine teeth similar, small, and in two approximated patches 

 in front of mouth. Tongue large, rounded, fleshy, thick, its margin 

 little free and with a small papilla medianly above. Nostrils like those 

 of preceding species, with small cutaneous rims, those of anterior pair 

 better developed. Maxillary barbel long, filamentous and reaching 

 a little more than half of length of entire fish or well beyond tip of 

 depressed dorsal. Mandibular barbel slender, inserted about opposite 

 posterior nostril and reaching about opposite origin of pectoral fin. 



Fig. 3. — Ompok jaynei Fowler. 



Gill-opening extending forward about opposite posterior nostril. 

 Rakers 2 + 7, simple, rather firm, slender, pointed, and about f of long- 

 est filaments. Longest filaments about equal to horizontal orbital 

 diameter. Branchiostegal flaps broad, left one forming a broad flap 

 over right, and radii about 8?. Isthmus broad. 



Body naked, skin smooth. Head with a number of pores. Lateral 

 line continued to base of caudal. 



Dorsal small, slender, first ray flexible, and insertion of fin a little 

 before first third in entire length of fish. Anal basis long, and basal 

 enveloping membrane also continued along lower edge of caudal pe- 

 duncle and out on base of caudal. Membrane on base of anal extend- 



