198 



BULLETIN OF THE 



is seated upon a lump-like elevation of the back, and its base is as long as the 

 snout. 



The second dorsal begins over the tenth to twelfth anal ray, and at a dis- 

 tance from the end of the first dorsal equal to the length of the head without 

 the snout. The vent is located not far behind the vertical from the end of the 

 first dorsal. 



The snout is acute, projecting beyond the mouth, its tip at a distance from 

 the mouth equal to or greater than the diameter of the eye. The bones of the 

 head are very soft and flexible, and its surface is very irregular, there being a 

 very prominent subocular ridge, a prominent ridge extending from the tip 

 of the snout to the middle of the interorbital space, and a curved ridge extend- 

 ing from the upper anterior margin of the orbit, over the cavity containing the 

 nostrils, to a prominent point, at the side of, and slightly posterior to tip 

 of the snout. The barbel is two thirds as long as the eye. The eye is con- 

 tained in the head four times, and the length of the head in the total length 

 six times. 



Eadial formula : D. II, 8, 100 ; A. 117 ; V. 10. 



The upper jaw extends to the vertical through the posterior margin of the 

 pupil ; its length equals half that of the head without the snout. The man- 

 dible extends behind the vertical through the posterior margin of the orbit ; 

 its length is contained three times in the distance from the tip of the snout to 

 the origin of the first dorsal. 



The interorbital space is almost twice the diameter of the eye, and is equal 

 to the length of the upper jaw. The preoperculum is crenulate. 



CHALINURA, new genus. 



Scales cycloid, fluted longitudinally with slightly radiating strioe. Snout 

 long, broad, truncate, not much produced. Mouth lateral, subterminal, very 

 large. Head without prominent ridges save the subocular ones, and those 

 upon the snout. The suborbital ridge is not joined to the angle of the pre- 

 operculum. Teeth in the upper jaw in a villiform band, with those in the outer 

 series much enlarged ; those in lower jaw uniserial, large. N<> teeth on vomer 

 or palatines. Pseudobranchia; present, but small. Gill-xakere Bpiny, depme 

 ible, stout, in double series on the anterior arch. Branchioetegal membrane 

 apparently free from the isthmus. Ventrals below the pectorals. Barbel 

 present. 



