340 DEEr-SKA FISHES OF THE ATLANTIC liASIN. 



The ChaUenficr obtained it in tlic niid-Atlantic (station 104), at a depth of 2,500 fath- 

 oms. Tlie Talisman also secured examples from station oi, off the Cape Verde Islands, at 

 a depth of 3,200 meters. 



SIREMBO, Bleeker. 



Siremho, Bleeker, Act. Soc. Sc. Neerlandaises, ni; .Japan, iv, 22. — GIintheb, Cat. Fish Brit. Mus., iv, 



373.— Giix, Pror. Acad. Nat. Sci., I'hihidelphia, 18(53, 253. 

 Siremho, Vaillant, Exp. Sii. Tiav. et Talismau, 267 (iu widely different sense). 

 Srolella, Kai'p, Wiegmanii's Arcliiv., 1858, 92. 



Brotiilids, with elongate body covered with small scales. Lateral line contimions, but 

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

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

 Teeth in villiform bands on jaw bones and palatines. Upi)er jaw longer, rreoperculum 

 unarmed. No barbel. Eranchiostegals 8. Pseudobrauchia- and air-bladder preseut. 

 Pyloric caeca 12. 



The genus, as limited by Gill, includes one species, 8. iner'fius (Schlegel) Bleeker, from 

 Japan and not certainly known to be bathybial. 



The genus Hoplobrotula GiU (Proc. Acad. Nat. Sci., 1863, 2.53) was established for another 

 Japanese form [Broiula armata, Schlegel), cited by Giinther iu his catalogue uuder 

 ISircmbo. It is not certainly known to be bathybial. 



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

 Sircmbo, IloplobroUila, Cata'tyx, 3Ih'oniis, Bathyonus, Porof/adus, N'ematonus, DipUivantho- 

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

 ing, probably, representatives of three subfamilies. 



MONOMITOPUS, Aleoek. 

 Monomitoims, Alcock, Ann. and Mag. Nat. Hist., 1890, ll, 297. 



This genus diflers from Sirembo iu the character of its pseudobranchi.ne, which are 

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

 by a single species, obtained by the Invcstiijator iu the Andaman Sea, in 490 fathoms. 

 {Sirembo nigripinnis, Alcock, op. cit., 1880 (Nov.), 38'i.) 



TYPHLONUS, Gunther. 

 Tt/jMonus, GiJNTUER, Ann. and Mag. Nat. Hist., 1878, 217; Challenger Report, xxil, 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 snuill, 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 siiiii)lc filaments, placed close together on the humeral symi)hysis. 

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

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



The only representative of this genus is TypMoHu.s ita>ins^ Giinther, (Challenger l\ei)ort, 

 XXII, 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 aiul Bean, Bull. Mns. Comp. Zoul., xii, 164. 



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

 scaleless. Vent far behind jjectoral, included iu a cleft. Mouth wide, oblique, the lower 



