340 DEEP-SEA FISHES OF THE ATLANTIC lUSIN. 



The Challenger obtained it in the mid- Atlantic (station 101), at a dei)tli of 2,500 fath 

 onis. The Taliaman also secured examples from station ci, off the Cape Verde Islands, at 

 a deiJth of 3,200 meters. 



SIREMBO, Bleeker. 



Sirembo, Bleeker, Act. Soe. Sc. Ncerlaiulaisos, in; Japan, IV, 22. — Gunther, Cat. Fish Brit. Mus., iv, 



373.— Gill, Proc. Acad. Nat. Sti., PbilatU-lphi.-i, 18G3, 253. 

 Siremio, Vaillajjt, Exp. Sci. Trav. et Talisman, 267 (in widely difterent sense). 

 liroteUa, Kaup, Wiegmann's Arcliiv., 1858, 92. 



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

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

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

 Teeth iu villiform bands on jaw bones and palatines. Upper jaw longer. I'leoperculum 

 unarmed. No barbel. Branchiostegals 8. Pseudobrancliiic and 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 Moplobrotula Gill (Proc, Acad. !^at. Sci., 1863, 253) was established for another 

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

 Sirembo. It is not certainly kno\vii to be bathybial. 



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

 Sire7)iho, Roplobrotida, Cata'tyx, Mixomis, Bathyonus, Porof/adiis, Xematonus, Diphicantho- 

 pomu, and Keobyihites. Vaillant's Sirembo is a congeries of heterogeneous forms, includ- 

 ing, probably, representatives of three subfamilies. 



MONOMITOPUS, Alcoek. 

 MonomUopus, Alcock, Ann. and Mag. N.at. Hist., 1890, ll, 297. 



This genus differs from Sirembo iu the character of its pseudobranchiii!, whicli are 

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

 by a single species, obtained by the Iiwestiijntor in the Andaman Sea, in -190 fathoms. 

 {Sirembo nigripinniSj Alcock, op. eit., 188!) (Nov.), 384.) 



TYPHLONUS, Gunther. 



TyphUnui, Gunther, Ann. and Mag. Nat. Hist., 1878, 217; Challenger Report, xxil, 118. 



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

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

 projecting beyond the mouth, which is rather small, inferior. Trunk very .shoi't, the vent 

 being below the i>ectoral; 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 symjihysis. 

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

 gill lamin;e rather short; gill rakers of moderate length; scales thin, deciduous, small. 



The only representative of this genus is TypMoHus nasits, Giinther, (Challenger Bepoit, 

 XXII, 119, PI. XXT, A.) obtained by the ChaUentjer 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. 

 Baraihronus, Goode and Bean, Bull. Mus. Comp. Zool., xii, 164. 



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 



