374 TELEOSTEI. ACANTHOPTERTGIJ. 



Family XLI. TRACHYPTERID^E. 



Tanioidei, pt., Cuv. ; Gymnetridte, pt., Swainson. 



Pseudobranchise present. Body elongate and strongly com- 

 pressed. Gill-openings wide ; gills four. Eyes lateral. Cleft of 

 mouth slight. Dentition feeble. Dorsal fin single, occupying the 

 whole back, composed of rays that are neither branched nor articu- 

 lated, anterior portion detached ; anal absent ; caudal not in the 

 longitudinal axis of the fish, or rudimentary ; ventrals thoracic. 

 Scales absent. Pyloric appendages numerous. Vertebrae many. 

 Bones soft. 



Geographical Distribution. All oceans, chiefly at great depths. 



1. Genus REGALECUS, Briinn. 

 Syn. Gymnetrus, Bl. Schn. 



Ventral in the form of a single filament with a dilated extremity. 

 Caudal fin, if present, minute. 



1216. (1.) Regalecus russellii. (Fig. 124.) 



Gymnetrus russellii (Shaw), Cuv. $ Vol. H. N. Poiss. x, p. 377. 

 Regalecus russellii, Day, Fish. India, p. 376, pi. Ixxix, fiir. 2, Suppl. 

 p. 800 (see synon.). 



B. v. D. 4-5/320. P. 11. V. 1. C. 4. 



Body lanceolate, smooth, without scales. Mouth small, oblique. 

 Teeth absent. Fins four or five rays on the head, at first distinct, 

 subsequently uniting and forming along filament; second dorsal 

 extends from neck to near caudal fin, the middle rays the longest. 

 Pectorals short. Caudal distinct from dorsal, consisting of four 

 rays united into one filament. Colour pale silver j dorsal fin with 

 a dark edge. 



Fig. V2A.Eegalecus russellii. 



A fish described and figured by Bussell, 2 feet 8 inches long, was 

 captured on the outside of the surf at Vizagapatam, March 1788. 

 Ihe species does not appear to have been subsequently observed. 



Jlab. Vizagapatam. 



Family XLII. GLYPHIDODONTID^E. 



I^SS^fe .^^ feWwVW ' MU11 - * Ctenolabrid^ Owen ; 

 Pseudobranchiae present. Gills three and a half. Eyes lateral. 



