DISCUSSION OF SPECIES AND THEIR DISTRIBUTION. 



289 



out canines. Operculum with a flat point: preopercnlum entire. Six branchiostegals. 

 Air bladder, none: pyloric appendages in .small Dumber. (Oiinther.) 



This genus includes several tonus from Van Diemen's Land, the west coasl of Patago- 

 nia and South America, and is represented in the deep-sea fauna by the species A. gobio, 

 Giinther (Challenger Report, i. Dart vi, Sinn,' Pishes, L880, 21, PI. ex), obtained at Challen- 

 ger stations 307, in 147 fathoms, and 312, in 1(1-1.") fathoms; in the Antarctic fauna of 

 Magellan Straits, and the littoral archipelago on the western side of the extremity of the 

 South American continent. Specimens were obtained from to ISi inches in length. 



ACANTHAPHRIT1S, Gunther. 

 Aeanthaphritis, GttNTHER, Challenger Report, i. Pari \i Shore Fishes), 1880,43. 



Head depressed, rail compressed. Cleft of the month subhorizontal, with the upper 

 jaw longer. Eye rather large, obliquely directed upwards. Scales large, ciliated. Two 

 separate dorsal tins, the first with live or six spines. Ventrals jugular, with 1 spine and 5 

 soft rays. The lower pectoral rays branched. Bauds of villiforni teeth in the jaws, with 

 outcauines; vomerine teeth in two small, widely separated patches. Opercles unarmed; 

 each preorbital with a horizontal spine pointing forward. Six branchiostegals. Gill-mem 

 branes entirely separate from each other, and from the isthmus. (Giinther.) 



This genus is represented by a single species, A. grandisquands, Giinther (loc. cit., pi. 

 xviii, Fig. A), represented by specimens obtained by the Challenger at station 192, near the 

 Ki Islands, at a depth of 129 fathoms. 



Family CH^ENICHTHYIDyE. 



Ckcenichthyoidw, Gill, Proc. Acad. Xat. Sci. Phila., 1861, 507. 



duenichthyidm, Gill. Ait. Fam. Fishes, 1872, 9 (No.93); Century Dictionary, 907. 



Acanthopterygian fishes typified by the genus Ghamichthys, and including those Perc- 

 opho idea which have the .snout produced and spatuliform, the body mostly naked, and two 

 dorsal tins, the first of which is short and the second long. (Gill,) 



BATHYDRACO, Gunther. 



Bathydraco, GOnthbb, Ann. and Mag. Nat. Hist., 1878, II, 18; Challenger Report, xxn, 48. 



Body elongate, subcylindrical; tail tapering and very attenuated behind; head de- 

 pressed, with snout much elongate, spatulate; mouth wide, horizontal, with the lower jaw 



BATHYDBAOO ANTABCTICUS. 



prominent; eyes very large, vertical, close together. Scales very small, embedded in the 

 skin. Lateral line rather wide, continuous. One dorsal tin; ventrals jugular; the lower 

 pectoral rays brain lied. Teeth in the jaws In villiforni bands; none on the vomer or the 

 palatine boues. Opercles unarmed; ten branchiostegals; the gill-membranes free from the 

 isthmus and but slightly united in front. Air-bladder none. Gills 1. l'seudobranchke none. 

 Gill-rakers short. 



The tyi f this genus is Bathydraco antarcticm, Gunther (loc. cit., PI. vm, Pig. A), 



taken by the Challenger, south of Heard Island (station 102), at the depth of 1,260 fathoms. 



19868— No. 2 19 



