DISCUSSION OF SPECIES AND THEIR DISTRIBUTION. 



289 



out canines. Operculum with a flat point; preopercuhuu entire. Six brancbiostegals. 

 Air bladder, none; pyloric appendages in small number. {GiintJier.) 



Tills genus includes several forms from Van Diemen's Land, the west coast of Patago- 

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

 Giinther (Challenger Report, i. Part vi, Shore Fishes, 1880, 21, PI. ix), obtained at Chullen- 

 ijer stations 307, in 147 fathoms, and 312, in 10-15 fathoms; in the Antarctic fauna of 

 Magellan Straits, and the littoral archii)clago on the western side of the extremity of the 

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



ACANTHAPHRITIS, Gunther. 

 Jcanthaiiliriiis, Guntdee, Challenger Report, i, Part vi (Shore Fishes), 1880, 43. 



Head depressed, tail compressed. Cleft of the mouth snbhorizontal, with the upper 

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

 separate dorsal flus, the first with &ve or six spines. Ventrals jugular, with 1 spine and 5 

 soft rays. The lower pectoral rays branched. Bands of villiform teeth in the jaws, with- 

 out canines; vomerine teeth ill two small, widely separated patches. Opercles unarmed; 

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

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



TUis genus is repres3nted by a single species, A. grandisqiiandu, 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 CHvENICHTHYID^E. 



Chwiiichiliyoida;, Gill, Proc. Acad. Nat. Sci. Phila., 1861, 507. 



Cliamichthyidii', Gill, Arr. Fam. Fishes, 1873, 9 (No.93); Century Dictionary, 907. 



Acaiithopterygiau fishes typified by the genus ChcvnicMhys, and including those Perc- 

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

 dorsal fins, the liist of which is short and the second long. (Gill,) 



BATHYDRACO, Gunther. 



liathydiaeo, Gunther, Ann. and Mag. Nat. Hist., 1878, ll, 18; Ch.iUenger Report, xxii, 48. 



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

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



BATHYDBACO ANTAECTICUS. 



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 I'ays branched. Teeth in the jaws In villiform bands; none on the vomer or the 

 palafiiic bones. Opercles unarmed; ten brauchiostegals; the gill-membranes free li'om the 

 isthmus and but slightly united in front. Air-bladder none. Gills 4. Pseudobranchiai none. 

 Gill-rakers short. 



The type of this genus is Bathydraco antarcticus, Giinther {loc. cit., PI. Vlil, Fig. A), 

 taken by the Challenger, south of Heard Island (station 152), at the depth of 1,2G0 lathoms. 



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