406 Bulletin 47, United States National Museum. 



668. SACCOPHARYNX AMPTJLLACEUS (Harwood). 



Both jaws armed with slender, curved, widely set teeth, biserial, or 

 their points in one irregular series, directed inwards. Length of jaws 

 from \ to 4 that of body, from tip of snout to vent. Dorsal fin com- 

 mencing a long way behind head, a short distance in front of vent; like 

 the anal, it may or may not reach the tail, which ends in an extremely 

 delicate and thin filament. Pectoral fin very short, but broad, and with 

 about 30 very thin rays. Gill opening an elongate slit; black, with a 

 bluish white line along base of dorsal, and sometimes of anal also. Length 

 of largest specimen about 6 feet, 14-J-58 inches, the tail 4 times length of 

 trunk. Atlantic Ocean, in deep water. Four specimens known, three of 

 these brought to the surface by having swallowed a fish too large for the 

 capacity of the stomach. (Giinther.) (ampulla, a flask.) 



Saccopharynx, MITCHILL, Ann. Lye. Nat. Hist. N. Y., 1824, 82, Open Atlantic. 



Ophiognathus ampullaceiis, HARWOOD, Phil. Trans., 1827, 52, Atlantic. 



Saccopharynx fiagellum, CUVIER, Regne Anim., Ed. 2, n, 355,1829, Atlantic; after MITCHILL; 

 GUNTHER, Cat., vni, 22, 1870; GUNTHER, Deep-Sea Fishes, Challenger, 256, 1887; JORDAN 

 & GILBERT, Synopsis, 365, 1883 ; GILL & RYDER, Proc. U. S. Nat. Mus., 1883, 271. 



Saccopharynx cJiordatus, STOKER, Synopsis, Fishes N. A., 237, 1846, Open Atlantic ; after 

 MITCHILL. 



Family LV. EURYPHARYNGID^E. 



Lyomeri with the branchio-anal portion much shorter than the rostro- 

 branchial ; the tail very elongate and moderately attenuated backwards ; 

 head flat above, and with a transverse rostral margin, at the outer angles 

 of which the eyes are exposed ; maxillaries excessively elongated back- 

 wards, parallel, and closing against each other as far as the articulation 

 of the 2 suspensorial bones ; with minute teeth on each jaw ; dorsal and 

 anal fins well developed and continued nearly to the end of the tail ; 

 the pectoral fins minute, narrow. (Gill & Ryder.) Deep-sea fishes; 

 2 genera* and two species known. 



196. GASTROSTOMUS, Gill & Ryder. 



Gastrostomus, GILL & RYDER, Proc. U. S. Nat. Mus., vi, 1883, 271, (bairdii). 



Cranium abbreviated and little or no longer than broad, the dentiger- 

 ous bones almost seven times as long as the cranium ; minute, acute, conic 

 teeth, depressed inwards in a very narrow band on the jaws ; no enlarged 

 teeth at extremity of mandible; tail with an eradiate membrane under 

 its terminal portion. (Gill & Ryder.) (yaorrip, stomach ; <rro//a, mouth.) 



669. GASTROSTOMUS BAIRDII, Gill & Ryder. 



Jaws with minute, acute, conical teeth, depressed inwards, in a very 

 narrow band, without fangs at the end of lower jaw. Length of jaws 

 more than half body, measured from snout to vent. Origin of dorsal 

 nearer to tip of snout than to front of anal ; neither dorsal nor anal reach- 

 ing tip of tail ; gill openings narrow. Black, with no whitish streak 



* The supposed genus and species, Eurypharynx pelecanoides, Vaillant, (Comptes Rendus, 1882, 

 1226) from deep water off Morocco, has the jaws about half length of body to vent, both jaws 

 with feeble dental granulations, and the lower jaw with two fangs in front. 



