PROCEEDINGS OF UNITED STATE8 NATIONAL MUSEUJI. 305 



Anal : 



Length of base 21 



Height of longest ray 'J 



Distance from veul rals 25 



Caudal : 



Length of luicldle rays lo 



Length of outer rays JsJfi 



Pectoral, length ». 27^ 



Ventral, length 23 



Dorsal rays X, 18 



Anal rays Ill, 20 



Scales G-50-l(3 



San Francisco, Cal., March 2, 1880. 



WESCRIPTIOIV OF A IVE^V SPECIES OF 1>EEP-WATER FINU (l€I( H- 

 TUV'S EOCKHVOTONI), FROITI THE COAST OF CAf.IFORIVIA. 



By DAVID S. JORDAN and CI1ARI.ES H. C;II.BERt! 



Icichthys gen. nov. 



Allied to Icostens Locking-ton, but the body lower and more elongate, 

 not compressed at the bases of the vertical fins. Head moderate; eyes 

 lateral ; mouth terminal, little oblique, with small, sharp teeth in one 

 series, in the jaws only. Gill-openings very wide, continuous. Gill- 

 rakers long. Pseudobranchi^ present. Branchiostegals 7. JUxii/ en- 

 tirely scaly. Lateral line continuous, unarmed. Bases of tins without 

 spinules. 



Dorsal and anal tins long and low, composed of soft rays only. Pec- 

 toral fins moderate. Ventral fins small, thoracic, I, 5. Pylorir ca^ca 

 about 6, large. Bones all very flexible, cartilaginous. 



The scaly body fully distinguishes this species from Icostens, with 

 which singular genus its affinities are intimate, although the known 

 species do not resemble each other closely. 



(Etymology: Cczoj, to yield or submit; r/^oc, lish — in allusion to the 

 flexible skeleton.) 



Icichthys lockingtoni sp. uuv. 



Body oblong, moderately elongate, somewhat compressed, the caudal 

 l)eduncle rather slender. 



Read moderate, compressed, with vertical cheeks, rather broad and 

 slightly convex above, the snout abruptly descending, hence bluntish 

 in profile. Profile nearly straight from upper part of snout to the nape. 



Mouth moderate, little oblique, the slender maxillary scarcely widened 

 at the tip, extending to rather below the frout of tlie pupil, the anterior 

 edge of the premaxillary on the level of the lower rim of the eye. Lips 

 thin. Upper lip not protractile. Premaxillary tapering backward, not 

 forming the whole margin of the upper jaw. Maxillary behind .slipping 

 eutii'ely under the membranous edge of the preorbital. Preorbital rather 

 Proc. ^n,t. Mus. 80 20 Sept. 38, 1880, 



