DISCUSSION OF SPECIES AND THEIR DISTRIBUTION. 403 



month wide, lateral, extending to beyond the center of the eye; intermaxillary not much 

 shorter than the maxillary. Teeth in villiform bands in both jaws; barbel very small. In- 

 terorbital space convex, its width being considerably more than the diameter of the eye, 

 which in a specimen •'! feet long is equal to the length of the snout and one-fourth of that 

 of the head. The scales are equally rough over the whole of their surface, all the spinelets 

 being directed backwards; there arc 7 or 8 scales in a transverse scries between the dorsal 

 fin and the lateral line. Head entirely covered with small scales. Anterior dorsal spine 

 armed with numerous small closely set barbs; outer ventral ray produced into a long 

 filament. Distance between the vent and isthmus two-thirds of the length of the head. 



Radial formula : J). 10; P. 19; V. 7. (Gunther.) 



Coryphcenoides rupestris has 4+ 15 gill-rakers (=19). The gill membrane is entirely free 

 from the isthmus behind. The inter maxilla is continued beyond its vertical process and 

 extends almost as far back as the maxilla, these two bones being about equal in length. 

 The last third of the intermaxilla is toothless. The intermaxillary teeth are in a very nar- 

 row band, which is uniform in width, and the outer teeth are only slightly enlarged. The 

 mandible has villiform teeth in a broad bunch-like band at the symphysis and becoming 

 uniserial behind. The eye is nearly circular. The snout projects slightly. Gill-rakers 

 longer and less tubercular in character than in H. berglax and M. acrolepis. The sub- 

 orbital ridge is feebly developed and is very abruptly curved upward and narrowed in 

 front of the eye where it joins the nasal ridge. In M. berglax and M. acrolepis the sub- 

 orbital ridge is very strong and is continued almost in a straight line towards the nasal ridge. 



Specimens of this tish were taken by the Porcupine and Knight Errant between Shet- 

 land and the Faroes in 200-500 fathoms. A single specimen was secured by the Blake from 

 station ccvi, in 41° 32' 50" K lat., 65° 55' YV. Ion., at a depth of 524 fathoms. The 

 Albatross obtained examples from station 2532, in 40° 34' 30" X. lat., GG° 48' W. Ion., at 

 a depth of 705 fathoms; Cat. No. 35661, U. S. X. M., from station 2238, in 39° 06' X. hit.. 

 72 10' W. Ion., at a depth of 904 fathoms; Cat. No. 32657, U. S. X". M., from station 2003, 

 in 37° 16' 30" X. lat., 74° 20' 36" W. Ion., at a depth of 641 fathoms; from station 254(i, 

 in 39° 53' 30" X. lat., 70° 17' 30" W. Ion., at a depth of 538 fathoms; from station 2549, 

 in 39° 51' 30" X. lat., 70° 17' W. Ion., at a depth of 571 fathoms; from station 2429, in 

 12 55' 30 ' X. lat., 50° 51' W. Ion., at a depth of 471 fathoms; from station 2078, in 41° 

 11' 30" X. lat., 66° 12' 20" W. Ion., at a depth of 499 fathoms; Cat. No. 355G8, U. S. X. 

 M., from station 2202, in 39° 38' X. lat., 71° 39' 45" W. Ion., at a depth of 515 fathoms; 

 from station 2528, in 41 ° 47' X. lat., 65° 37' 30" W. Ion., at a depth of 677 fathoms; and 

 from station 2554, in 39° 4S' 30" X. hit., 70° 40' 30" W. Ion., at a depth of 445 fathoms; 

 The Fish Hawk from station 1155, in 39° 52' X. lat., 70 30' W. Ion., at a depth of 554 

 fathoms; and Cat. Xo. 28943, U. S. X. M., from station 1029, in 39° 57' 05" X. lat., 69° 16' 

 W. Ion., at a depth of 45S fathoms. A single individual (Cat. 26347, U. S. X. M.) was 

 captured by the schooner G. P. Whitman off the southern part of Banquereau. 



CORYPJL&NOIDES SULCATUS, Goode and Bean. 



Coryphwnoides sulcattts, Goode and Bean, Proc. U. S. Nat. Mus., 1888, 596. 

 Trachonurus ealcatas, GOODE and Bean, Oceanic Ichthyology, 1893. tin. 



The body is elongate, rapidly contracted behind the abdomen, the tail long and whip- 

 iike; greatest hight of body (25 millimeters) 9J times in total length. 



Scales moderate, strongly armed, each with 8-10 spinelets irregularly placed, the spine- 

 lets less numerous in the young, which feel bristly to the touch, separated by wide deep 

 furrows (hence the specific name). More than 175 in the lateral line. Between origin of 

 dorsal tin and lateral line 7; counting from the origin of the lateral line the number of scales 

 in a distance equal to length of head is 33. 



Armature of head similar to that of body, but the scales upon the snout, cheeks, ami 

 chin have very feeble spines. Length of head (32 millimeters) 11 times in total length. 



Interorbital area nearly flat, its length (10 millimeters) equal to diameter of eye, and a 

 little less than one-third length of head. Postorbital portion of head (15 millimeters) 1£ 



