NO. 1493. FISHES FROM PORT ARTHUR— JORDAN AND STARKS. 



519 



14. COLLICHTHYS NIVEATUS Jordan and Starks, new species. 



Head 'd\ in length to base of caudal; depth 3. Eye -ti in head; 

 snout 4i; maxillary If; interorbital space 2|. Dorsal, IX, 24; anal, 

 II, 12. 



Body somewhat shorter and deeper than in CoWcldhya fragilis. 

 Lower jaw projecting-, its lip entering upper profile of head; gape 

 very oblique, on an angle of about 45 degrees with axis of body. 

 Teeth on mandible larger, more curved and in fewer rows than in 

 Collichthys fragilis. On posterior part they are in a single row and 

 in 2 rows in front (2 or 3 teeth at extreme tip in a third row); in the 

 latter species they are in 2 rows posteriorly and in 3 or more rows in 

 front. Teeth on premaxillary not noticeably different in the two 

 species; in broader bands than on mandible; much smaller than man- 

 dicular teeth in ColllchtJtys nivtatus; little if anj^ smaller in Collich- 



FiG. 2. — Collichthys niveatus. 



thys fragilis. No teeth on vomer or palatines. Maxillary wide and 

 slipping under preorbital for its full length; its posterior end reaches 

 to the verticle from posterior edge of or])it. Anterior end of premax- 

 illary on a level with middle of eye. Top of head, sides of head very 

 cavernous, covered with thin naked skin leaving the sharp angles of 

 the bones more or less projecting. A sharp bou}' crest at occiput 

 ending before and behind in a short spine, the anterior spine the 

 longer and sharper. Between the spines the crest is smooth and con- 

 cave; in CollicJithys frag His., it is nearly always l)roken up into from 

 1 to 3 sharp bony tubercles. 



Pectoral If in head; ventral If, reaching f of distance between its 

 base and vent. Longest dorsal rays 2 in head, equal to those of anal, 

 a little longer than longest spines. Caudal pointed, equal to length 

 of head. The scales on our specimens are all absent, but from the 

 scale pockets, which are evident on the venti'al surface, the scales were 

 much larger than in Collichthys frag Ills. There are lU scales in a row 



