340 DEEP-SEA FISHES OF THE ATLANTIC BASIN. 



The Challenger obtained it in the mid-Atlantic (station 104), at a depth of 2,500 fath- 

 oms. The Talisman also secured examples from station ci, off' the Cape Verde Islands, at 

 a depth of 3,200 meters. 



SIREMBO, Bleeker. 



Sirembo, Bleeker, Act. Soc. Sc. Neerlandaises, m; Japan, iv, 22. — Giinther, Cat. Fish Brit. Mus., iv, 



373.— Gill, Proc. Acad. Nat. Sci., Philadelphia, 1863, 253. 

 Sirembo, Vaillant, Exp. Sci. Trav. et Talisman, 267 (in widely different sense). 

 Broiellu, Kaup, Wieguiann's Arcliiv., 1858, 92. 



Brotulids, with elongate body covered with small scales. Lateral line continuous, but 

 more or less indistinct. Eye moderate. Vertical tins united. Veutrals close together; 

 each a single simple filament, inserted on the foremost part of the humeral symphysis. 

 Teeth in villiforui bands on jaw bones and palatines. Upper jaw longer, rreopercuhuu 

 unarmed. No barbel. Branchiostegals 8. Pseudobranchiai aud air-bladder present. 

 Pyloric caeca 12. 



The genus, as limited by Gill, includes one species, s. inermis (Schlegel) Bleeker, from 

 Japan and not certainly known to be bathybial. 



The genus Hoplobrotula Gill (Proc. Acad. Nat. Sci., 1803, 253) was established for another 

 Japanese form (Brotula armata, Schlegel), cited by Giinther in his catalogue under 

 Sirembo. It is not certainly known to be bathybial. 



Vaillant enlarges the limits of Sirembo to include the forms here discussed under 

 Sirembo, Hoplobrotula, Catcetyx, Mixonus, Bathyonus, Porogadus, ITematonus, Diplacantho- 

 poma, and Neobythites. Vaillant's Sirembo is a congeries of heterogeneous forms, includ- 

 ing, probably, representatives of three subfamilies. 



MONOMITOPUS, Alcoek. 

 Monomitopus, Alcock, Ann. and Mag. Nat. Hist., 1890, II, L".'7. 



This genus differs from Sirembo in the character of its pseudobranchia?, which are 

 rudimentary — "really consisting of 2 small pinnules only on each side." It is represented 

 by a single species, obtained by the Investigator in the Andaman Sea, in 100 fathoms. 

 (Sirembo nigripinnis, Alcock, op. cit., 1889 (Nov.), 384.) 



TYPHLONUS, Giinther. 

 Typhlonus, Ginther, Ann. and Mag. Nat. Hist., 1878, 217; Challenger Report, xxn, 118. 



Head large, compressed, with most of the bones in a cartilaginous condition; the 

 superficial bones with large muciferous cavities not armed. Snout a thick protuberance 

 projecting beyond the mouth, which is rather small, inferior. Trunk very short, the vent 

 being below the pectoral; tail thin, strongly compressed, tapering, without separate cau- 

 dal. Eye externally not visible, reduced to a minute rudiment hidden below the skin. 

 Bands of villiform teeth in the jaws, on the vomer and palatine bones. Barbel, none. 

 Veutrals reduced to simple filaments, placed close together on the humeral symphysis. 

 Gill openings very wide, the gill membranes being but slightly united in front. Gills 4; 

 gill lamina' rather short; gill rakers of moderate length; scales thin, deciduous, small. 



The only representative of this genus is Typhlonus nasits, Giinther, (Challenger Report, 

 xxu, 119, PI. xxv, A.) obtained by the Challenger at station 181, northeast of Aus- 

 tralia, in 2,440 fathoms, and at station 198, north of Celebes, at the depth of 2,150 fathoms. 



BARATHRONUS, Goode and Bean. 

 Barathronus, Goode and Bean, Bull. Mus. Comp. Zool., xn, 161. 



Brotulids having the head stout, body and tail compressed, covered closely by skin, 

 scaleless. Vent far behind pectoral, included in a cleft. Mouth wide, oblique, the lower 



