58 DEEP-SEA FISHES OF THE ATLANTIC BASIN. 



times in the distance from the tip of the snout to the origin of the dorsal. Dorsal fin 

 inserted at a distance from the tip of the snout equal to twice the length of the head, the 

 length of its base nearly one-third of total (without caudal). The anal origin is under the 

 posterior third of the dorsal, the length of its base equal to half that of the head. Pecto- 

 ral small, placed low, immediately back of the branchial opening; apparently few-rayed. 

 Color, black. 



Radial formula: B. 8; D. 20; A. 10; V. 8; P. 6. 



The condition of the specimen is very bad, and it is only the desire to call attention to 

 this interesting form that induces us to give it a name. 



A single specimen, 8J inches in length, was taken by the Bhtke off Santa Cruz, at a 

 depth of 2,393 fathoms. 



BATHYSAURUS, Gunther. 



Bathysaitrus, Gunther, Ann. and Mag. Nat. Hist., August, 1878, 181; Challenger Report, xxn, 181. 



Shape of the body similar to that of Saurus, subcylindrical, elongate, covered with 

 small scales. Head depressed, with the snout produced, flat above. Cleft of the mouth 

 rather wide, with the lower jaw projecting; intermaxillary very long, styliform, tapering, 

 not movable. Teeth in the jaws in broad bands, not covered by lips, curved, unequal in 

 size, and barbed at the end. A series of similar teeth runs along the whole length of each 

 side of the palate, a few teeth on the tongue, and groups of small ones on the hyoid. Eye 

 of moderate size, lateral. Pectorals of moderate length. Ventral s rayed, inserted imme- 

 diately behind the pectoral. Dorsal fin in the middle of the, length of the body, with about 

 18 rays. Adipose fin absent or present. Anal of moderate length. Caudal emarginate. 

 Gill openings very wide, the gill membranes being separate from each other and from the 

 isthmus. Eleven or twelve branchiostegals. Gill laminre well developed, separate; gill 

 rakers tubercular; pseudobranchise well developed. (Uiinther.) 



BATHYSAURUS FEROX, Gunther. (Figures 65, 66.) 



Bathysaitrus ferox, GtiNTHER, Ann. and Mag. Nat. Hist., 1878, 5th series, n, p. 182. — Challenger Expedition 

 xxn, p. 181, pi. xlvi, lij;. A. 



Bathysniuus Agassizii, Goode and Bean, Bull. Mus. Conip. Zoo]., x, No.5, 215. — Jordan, Cat. Fishes N. Amer- 

 ica, 1885, 40. 



Body very elongate, subcylindrical, with depressed head and tapering tail, its greatest 

 height contained 7 times in its length, without caudal, and 8 times in the length to tip of 

 upper caudal lobe; its greatest width 9 times in standard length; its height at origin of 

 anal about half its greatest height; length of caudal peduncle equal to greatest height of 

 body. 



Scales irregularly ovate, with the free portion convex, thin, cycloid, leathery, deciduous; 

 those in middle (it body with a vertical diameter nearly equal to that of the pupil; those of 

 lateral line with posterior margin truncate. In the lateral line, which extends upon the 

 caudal fin, descending below the median line of the body near the origin of this fin, are 

 78 specialized scales, larger than those of the body. Between the dorsal fin and the lateral 

 line are about 8 rows of scales; between the latter and the anal fin are about the same 

 number. 



Head twice as long as the greatest height of the body 7 , strongly depressed, alligator- 

 like, naked except upon the cheeks and a small area on the occiput, with strong nasal and 

 interorbital ridges. The greatest width is somewhat more than half its greatest length, 

 the width of interorbital area nearly equal to one fourth the length of the lower jaw. The 

 length of the snout is equal to twice the horizontal diameter of the eye. The anterior nos- 

 trils are situated midway between the tip of the snout and the anterior margin of the orbit. 

 The cleft of the mouth is enormous, its angle posterior to the eye by a distance about equal 

 to the width of the interorbital space. The length of the upper jaw equals one-sixth of the 

 standard body length ; that of the lower jaw, one fifth. The margin of the upper jaw (formed 

 by the intermaxillary only) is armed with two irregular rows of depressible teeth, some of 

 which are barbed; those in the inner row are much the largest, many of them being two- 



