10 AET. 13. — S. TANAKA : 



side by 2 sharp ridges, which are closely apposed over the middle 

 of the orbit and diverge forward and backward from this pouit ; 

 a minute bluntish protuberance at the upper posterior margin 

 of the orbit, and behind this a third ridge, outside the 2 wliicli 

 bound the interorbital area ; '"'' snout slightly shorter than eye. 

 Mouth large, oblique ; maxillary reaching to angle of opercle. 

 Mandible massive, slightly protruding beyond maxillaries. Teeth 

 on jaws, vomer and palatines ; all pointed, subequal ; 4 very long, 

 slender canines near tip of upper jaw, of which the inner pair 

 is slightly smaller ; lateral teeth of the upper jaw smaller and 

 subequal, arranged two by two ; mandible with 2 long canines 

 near tip, similar in form and size to tlie external pair near tip 

 of upper jaw ; lateral teeth on the jaw smaller and diminishing 

 in size posteriorly, sometimes arranged two by two ; one or two 

 minute, slender teeth on each side of the head of vomer ; teeth 

 on palatines very small and slender, arranged in one row ; tongue 

 with a row of slender teeth near each lateral edge. Maxillary 

 with close-set, fine teeth on lower edge of the posterior half, the 

 teeth directed backward and increasing in size posteriorly. Barbel 

 from under surface near tip of mandible, long, with dilated tip, 

 extending midway between tip of pectoral and insertion of ventral. 

 Dorsal inserted midway between caudal base and posterior 

 rim of eye, the posterior end of its base at a distance of head 

 length without snout in front of the insertion of anal ; the 

 rays slender, the longest ray li in head ; adipose fin very 

 slender, situated about midway between the posterior end 

 of the base of dorsal and caudal base. Anal inserted before 



* The passage liere quoted is from the description of Astrona^thes Iwifer by Dr. Gilbert 

 (Bull. U. S. F. C. for 1903, pt. 2, 1905, p. OOG) and holds equally good, so far as it goes, 

 for the new^species here described. 



