408 DEEP-SEA FISHES OF THE ATLANTIC BASIN. 



Tliis species belongs in the siiboeniis KcmntonKrus ofdiiiither. It resembles Macrurus 

 a finis, from wliicli it differs in its smaller eye (one-flftli as long as the head), and in having 

 the head contained 5'§ times in the total length, instead of 5 times as in affinis. 



The Blale secnred specimens from stati<m cccviii, in 41° 25' 45" N. lat., 05° 35 30" W. 

 Ion., at a depth of 1,L'42 fathoms; from station cccix, in 40^ 11' 40 " K lat., 08° 23' W. Ion., 

 at a depth of 304 fathoms; and from station Lxxvi, oft" Havana, at a depth of 154 fathoms. 

 The Alhafross also obtained examples from station 2564, in 39° 22' N. lat., 71° 23' 30" W. 

 Ion., at a depth 1,390 fathoms; from station 25G3, iu aO'^ 18' 30" ]S^. lat., 71° 23' 30" W. Ion., 

 at a depth of 1,422 fathoms; from station 2534, in 40° 01' N. lat., 07° 29' 15" W. Ion., at a 

 depth of 1,234 fathoms; from station 2502, in 39^ 15' 30" N. lat., 71° 25' W. Ion., at a (lej)tli 

 of 1,434 fathoms; Cat. No. 33392, U. S. N. M., from station 2074, in 41° 43' N. lat., 05^ 21' 

 50" W. Ion., at a depth of 1,309 fathoms; Cat. Nos. 33274 and 33276, U. S. N. M., from sta- 

 tion 2035, in 39° 20' 16" N. lat., 70'^ 02' 37" W. Ion., at a depth of 1,309 fathoms; Cat. :No. 

 33302, U. S. N. M., from station 2041, in 39° 22' 50" N. lat., 68° 25' W. Ion., at a depth of 

 1,608 fathoms. 



HYMENOCEPHALt'S CAVERNOSUS, Goodk aii.l Bf.an. (Figure 341.) 



Balhygadiis carernosus, Goodk au<I Bean, Proc. II. .S. Nat. Miis., 188.5, .5!)8. — (fi'NTiiKn, ('hallenger Report, 

 XXII, 1887, 156. 



Body stoutish, its greatest height (23 millimeters) contained 7 times in total length. 



The scales are moderate, deciduons, cycloid, with no visible armature, about 8 rows 

 under the base of the first dorsal. 



Length of head (28 millimeters) about 6 in total length. The bones of the head are 

 very soft and cavernous, in many i>laces without muscular covering, spongy. Interorbital 

 area doubly concave with a spinous medial ridge; its greatest width (10 millinieteis) about 

 24 in the length of the head. 



Postorbital i)ortion of head (!■') millimeters) about half its length, 1=^ as long as eye, 

 which is circular, its diameter (10 millimeters) contained 2f times in the length of the head. 



Snout broad, very obtuse, its width at nostril nearly equal to interorbital width, its 

 length (6 millimeters) 4g times iu that of the head. Nostrils normal. 



Teeth in both jaws in villiform bands, very small; a naked space at the symphysis of 

 of the intermaxillary'; vomer and palatine toothless. Gill-rakers very short, minute, and 

 rather numerous; about 18 below the angle of the anterior arch. Pseudobranchiie absent. 

 Barbel two fifths as long as the eye. 



First dorsal composed of 2 spines, the first of which is minute, inserted at a distance 

 from the snout (28 millimeters) equal to the length of the head; the second as long as the 

 head without the snout, and 10 branched rays; its base (10 niillinieters) ecjual to diameter 

 of eye. Second dorsal almost rudimentary, its rays remarkably short, abont 133 in num- 

 ber; its distance from the first dorsal half the length of head. 



Anal much higher than second dorsal, its distance from the snout (40 millimeters) con- 

 tained about 3i times in the total length. About 27 Bays in a space equal to lengtli of 

 head. Anterior rays longest, in length about three-fourths of the diameter of the eye. 



Pectoral inserted under the first bram^hed ray of the first dorsal, its length (20 inilli 

 meters) equal to twice that of the eye and abont two-thirds length of head. 



Ventral slightly behind the pectoral, its first ray filamentous, reaching to the base of 

 the tenth anal ray; it consists of 11 rays. 



Color, gray, with silvery tints on sides; the abdomen and lips dark. 



Dr. Bean has reexamined the types of Bnthyjiatlufi caveruosiis, and is convinced that 

 Dr. (liinther is probably right in his statement that it belongs to the subgenus M>/st<i- 

 comiriis, but since the specimens are all young and have mori^ rays in the ventral tin 

 than the described species, it can not be referred to ^1/. lonyifills, and nnist be called r()r the 

 present HtimeHovephnlus vavcrnosus. 



The following revised data are presented: D. ii, 10, 133; A. 27 rays in space equal to 



