96 DEEP-SEA FISHES OF THE ATLANTIC BASIN. 



MAUROL1CUS BOREALISj(Nilsson), Gunther. (Figure 111.) 



Scopelus borealis, Nilssox. Observ. Zool., 9. 



Maurolicusborealis, Gunther, Cat. Fish. Brit. Mus., v, 389. 



Scopelus Humbuldti, 1)E Kay, N. Y. Fauna, Fish., 246. (Not of Cuvier.) Stoker, Hist. Fish. Mass., 328. 



Body compressed. Mouth wide, the lower jaw much projecting'. Teeth small. Eye 

 large, 3 in head. Five luminous spots on the throat, 12 between pectorals and ventrals, 

 above these a row of 8, 5 between ventrals and anal, vent to tail 24. Dorsal nearer tail 

 than snout. Adipose tin very small. Ventrals below dorsal. Caudal forked. Color: dark 

 greenish, sides silvery. 



Head, 3£; depth, 3£. Radial formula: D. 10; A. 15. 



A specimen of this species was picked up on the beach near Provincetown in August, 

 1879, by Dr. Bean. It had previously been found off the coasts of Great Britain and Scan- 

 dinavia. 



Specimens were obtained by the Albatross from station 2402, in 28° 36' N. lat., 85° 33' 

 \Y. Ion., at a depth of 111 fathoms; and No. 29000, U. S. N. M., from station 1041. in 38© 37' 

 N. lat., 73° 12' W. Ion., at a depth 224 fathoms. A specimen was also received by the 

 National Museum from Woods Holl, Massachusetts. 



Family CH AULIODONTIDyE. 



Chauliodontina, GCnther, Cat. Fish. Brit. Mus., v, 1864, 391, 392 (group under Sternopty chides). 

 Chauliodontidw, Bonaparte, Catologo Metodico, 1846, 5. — Gill, Arrangement Families of Fishes, 1862, 15. — 

 Jordan and Gilbert, Bull, xvi, U. S. Nat. Mus., 281. 



Body oblong or elongate, compressed, covered with rather large, thin, deciduous scales, 

 Lateral line present. No barbels. Series of phosphorescent spots running along the lower 

 side of the head, body, and tail. Head much compressed, the bones thin, but ossified. 

 Mouth with the cleft extremely wide, its margins formed by mamillaries and premaxillaries, 

 both ot which are provided with teeth. Teeth unequal, some of them long and pointed, 

 fang-like. Pectorals and ventrals well developed. Adipose fin present. Caudal forked. 

 Gill openings very wide. No pseudobranchiae. 



CHAULIODUS, Schneider. 



Chauliodus, Schneider, Bloch, Systema Ichthyologhe, 1801, 430.— Gi nthei:, Cat. Fish. Brit. Mus., v, 392.— 

 Jordan and Gilbert, Bull, xvi, 1". S. Nat. Mus.. 284. 



Body elongate, compressed, covered with very thin, deciduous scales of moderate size. 

 Head short, much compressed and elevated, the lower jaw projecting, the snout much shorter 

 than eye. Mouth extremely wide, the cleft reaching much beyond eye. Premaxillaries 

 attached to spine with 4 long, fang-like canines on each side. Mandible with pointed, 

 wide-set teeth, the anterior ones excessively long; none of these large teeth received within 

 the mouth. Maxillaries with tine teeth ; palatine with a single series of small, pointed teeth ; 

 no teeth on the tongue. Eye moderate. Pectorals moderate. Ventrals large. Dorsal fin 

 high, placed anteriorly, well in front of the ventrals. Adipose fin moderate, sometimes fim- 

 briate, opposite the low, short anal. Caudal moderate, forked. Gill openings very wide. 

 No pseudobranchiai. No gill rakers. Branchiostegals numerous. {Jordan and Gilbert.) 



The question of the presence or absence of the air bladder having never been inves- 

 tigated, a dissection by Dr. Bean has revealed the presence of a conspicuous but thin-walled 

 organ. The specimen (No. 35626, U. S. N. M.) taken by the Albatross shows long, slender 

 ovaries, with small but perfectly distinct eggs. 



C.pammelas, Alcock (Ann. & .Mag. Nat. Hist. 1892, 11, 355) is from the Indian Ocean, 

 Investigator and station 126, 1,310 fathoms. It is close to ft Sloani. 



CHAULIODUS SLOANI, Schneider. (Figure 115.) 



Chauliodus Sloani, Schneider, Bloch's, Systema Ichthyologi.^, 1801, 430. — Ccvier & Valenciennes, Hist. 

 Nat. Poiss., xxii, 383. — Gunther, Cat. Fish. Brit. Mus., v. 392; Challenger, xxii, 179.— Aj.cock, Bathy- 

 bial Fishes of Bay of Bengal. 1889, 25; Ann. and Mag. Nat. Hist., 6th Ser. VII, 11; 1891, II, 127; 1892, 



