302 Mr. A. Alcock on the BatliyUal Fishes 



Bathygadus, Gtlir. 



7. Bathygadus longifilis^ Goode & Bean. 



Bathygadus longifilis, Goode & Bean, Proc. U. S, Nat. Mus. viii. p. 599 ; 

 Guntlier, Zool. ' Challenger ' Exp. xxii. p. 157. 



Hymenocephalus longiJiUs^ Vaillant, Exp, Sci. ' Travailleur ' et ' Talis- 

 man,' Poiss. pp. 218-221, pi. xxiii. fig. 1. 



A large female specimerij llf inches long, with gravid 

 ovaries. 



It has the radio-squamal formula 



B. 7. D. 11 140 circ. P. 15. V. 8. 

 L. lat. circ. 150. L. tr. circ. 25 through vent. 



The fourth branchial cleft exists, though it is not apparently 

 functional. The stomach is siphonal ; the intestine coiled, 

 with about twenty-two large long pyloric cseca. The liver 

 and spleen are very large, and the air-bladder is well- 

 developed. 



A smaller male(?) specimen, 8 inches long, with the same 

 radio-squamal formula and with the barbel measuring more 

 than I the length of the head. 



Station 105, 740 fathoms. 



Physostomi. 



Family Scopelidae. 



SCOPELENGYS, gen. nov. 



Apparently nearly allied to Scopelus^ Gthr., and to Naiio- 

 brachium, Gthr. ; but as the single specimen for which the 

 generic distinction is claimed is entirely denuded of its 

 integuments down to the muscles, its exact position among 

 the Scopelidae cannot be accurately defined at- present. 



Head and body compressed. Eye small. Mouth very 

 wide ; the maxilla dilated behind. Acute villiform teeth, in 

 bands uncovered by the lips in the jaws, and in the palatines 

 and vomer. Gill-openings very wide ; gill-covers complete. 

 Pseudobranchise rudimentary. Dorsal fin near the middle of 

 the body, short ; an adipose dorsal. Anal fin short. Caudal 

 forked. Pectorals well developed. Ventrals with eight rays. 

 [Scales, if present, very deciduous.] No air-bladder. Pyloric 

 cseca present in moderate number. 



