DISCUSSION OF SPECIES AND THEIR DISTRIIJUTION. 323 



being developed. The palatine band is broader than the niandibulary, and the vomerine 

 band A-shaped, each arm being bent with the convexity inwards. 



Gill-opening and cavity very wide and of an intense black. The gill rakers are much 

 longer than the lamina, 15 in number ou the anterior arch, besides some rudimentary ones 

 above. 



The dorsal fin commences above the upper end of the gill-opening, with short rays 

 partly hidden in the skin ; the rays become longer in the middle of the tin, but remain of 

 moderate length, and the anal rays are still shorter. The pectoral has a rather narrow 

 base, is quite free, and composed of feeble rays; its length is only half that of the head. 

 Ventral rays very feeble, reaching somewhat beyond the root of the pectoral. 



Only very few of the thin, cycloid, scales have been preserved; they are of moderate 

 size, there being about sixteen in a transverse series running from the vent to the dorsal fin. 

 The lateral line, if it was developed, can no longer be traced. 



Kadial f.u'mida: D. 10)J; A. 92; P. 23; V. 1. Color, blackish, with the tins, head, and 

 abdomen black. (Giinther.) 



The species was obtained by the Challenger from the mid- Atlantic in 1,500 fathoms 

 (station 107), and also from the Philippines (station 205), at a depth of 1,050 fathoms. 



BASS0ZETU!5 TAENIA, (Gunther), Goode aiul Be.vn. 

 Batliyonus iamia, Gunther, Challeugor Report, xxii, 1887, 110, PI. xxin, Fig. A. 



The greatest depth of the body is below the origin of the dorsal tin and about one third 

 of the length of the trunk, the vent being not quite thrice as distant from the extremity of 

 the tail as from the snout. Therefore the whole fish, and especially the tail, is much 

 attenuated. Head not compressed, low and long, forming four-sevenths of the length of 

 the trunk. Structure of the bones of the head as in Bassozetus compreiisus. Snont rather 

 swollen and broad, the upper jaw but slightly overlapping the lower. IMaxillary extending 

 tar behind the eye, which is very small, oue-tliird the length of the snout, about one-four- 

 teenth of that of the head, and one-fourth of the width of the interorbital space. All the 

 teeth are very small and short, densely set, forming narrow villiforin bands; vomerine band 

 open, V-shaped. Gill-cavity deep black; gill-rakers long and slender, sixteen in number, 

 with some rudimentary ones in front and behind. 



The dorsal tin commences above the u])per end of the gill-opening, with short rays 

 partly hidden in the skin; the rays become longeron the anterior tliird of the tail, but 

 remain of moderate length, and the anal rays are still shorter. The i)ectoral has a broad 

 base, is cpiite free, and composed of rather feeble rays; its length is equal to that of the 

 postorbital part of the head. Ventral rays very feeble, reaching nearly to the middle of the 

 pectoral. 



The scales must have been extremely thin, and rather small; there are [)robabl.y about 

 twenty in a transverse series running from the vent to the dorsal tin. The lateral line can 

 not be made out. 



Radial formida : D. 138; A. 115; P. 30. 



Light-colored (possibly pink in life), with the head and abdomen black. 



BASSOZETUS CATENA, Goode aud Be.vn. (Figure 286.) 



i?a(A;/oreH8 cofena, Goode aud Bean, Proc. U. S. Nat. Mus., viii, 1885, 003. — GL'sther, Challenger Report, 

 XXII, 1887, 111. 



Body very elongate, much compressed, and tapering into a slender, whip-like tail. Its 

 height (19 millimeters) is contained l.i times in length of head and 12.i times in that of the 

 body. 



Head without spines, very cavernous, not much compressed, higher than body, its 

 length (27 millimeters) contained 8g times in that of body. Interorbital area somewhat 

 convex, its width (measured upon the bone) equal to the diameter of tbe eye and about 

 equal to that of the snout, and contained 5 times in the length of head. 



