PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 249 



1 



cave longitudinally; dorsal outline, from occiput to caudal peduncle, 



regularly arched, the highest point at anterior part of hrst dorsal; 



mandible straight; abdominal outline regularly curved. 



Greatest depth o^ times, depth of caudal peduncle 12, length of 

 head 3j^o) length of i^ectoral 4^ in total length to extremity of caudal 

 fin; orbit (longitudinal diameter) 5i, mandible 2^, interorbital width 

 about 2^f, in length of head. 



Gax)e straight, maxillary extending to a little in front of the center of 

 the pupil, its uj^per edge received in a groove below the preorbital for 

 most of its length. 



Teeth of mandibles and intermaxillaries slender, sharp, recurved; in 

 several rows in front, gradually diminishing laterally to a single row ; 

 front teeth slightly longer than lateral teeth. A few similar but smaller 

 teeth on vomer and v)alatines. Upper pharyngeals with a cushion of 

 similar teeth; lower pharyngeals slender, with a patch of similar teeth 

 in the form of a very obtuse triangle, the internal row largest. 



Gillrakers short, ciliated, those on the anterior aspect of the first x)air 

 of gill-arches longer than the others. 



BranchiostegaU" seven ; gill-membranes continuous below, but attached 

 to an isthmus throughout the entire length of their junction except the 

 posterior margin. 



Nostrils just above a line joining the upi)er margin of the orbit with 

 the tip of the snout, simple, elliptical, the i^osterior far the larger. 



Eyes lateral, subelliptical, the upper margin of the orbit less curved 

 than the lower; interorbital space wide, slightly convex transversely. 



Longitudinal diameter of orbit 1^ in length of snout. 



Oi^ercular bones without spines or denticulations. 



Pectoral base vertical ; pectoral broadly lanceolate, the upper margin 

 curved; 5th ray longest; 4th, Gth, 7th, and 8th only slightly shorter, 

 thence diminishing rapidly downwards. Tip of liectoral about vertical 

 with base of 11th ray of spinous dorsal, but considerably short of the 

 vent. Rays twice branched. 



Ventrals inserted a little behind pectorals, their length If in that of 

 the pectorals. Rays twice bifurcate. 



Spinous dorsal commencing about opposite 20th scale of lateral line; 

 first spine very short ; 2d and 3d raj)idiy increasing ; 4th longest ; thence 

 diminishing regularly to 12th ; 13th and 14th directed backwards, hori- 

 zontal, their points only free ; 15th spine at base of 1st soft ray. 



Third ray of soft dorsal longest, thence diminishing regularly ; rays 

 sj)lit up at tips. 



Anal commencing about oj)posite base of 7th ray of 2d dorsal, and 

 preceded by two weak spines hidden in membrane. First soft ray 

 longest ; rays split at tips. 



Caudal with many accessory rays and about sixteen principal rays, so 

 that its lateral margins are convex ; posterior border somewhat emargi- 

 nate ; rays much divided at tijjs. 



