DISCUSSION Oi^ SPECIES AND THEIR DISTRIBUTION. 447 



closely ill other external cliaracters we feel compelled to retain it in that melius for the pres- 

 ent at least. 



A specimen (D. 77; A. 61; V. (i; L. lat. 40) was taken by the Alhatro.ss from station 

 2417, iu 33° 18' 30" N. lat., 77° 07' W. Ion., otf dape Fear, at a depth of 05 fathoms. 



CITHARICHTHYS SPILOPTERUS, GiNTHEU. ( I'igure 370. ) 



CilhiirUldhjis s/ii/o^i/tTMS, Gunther, C;it,. Fish. Brit. Mua., iv, 421. 



The height of the body is two-tifths of the total length (witliont caudal), the length of 

 the head two-sevenths. Scales of the lateral line snbcpiadrangular; lateral line nearly 

 straight, gently descending anteriorly. Snout with the jaws equal in front, ratlier longer 

 than the eye, the diameter of which is one sixth of the length of the head. The maxillary, 

 the length of which is contained twice and two-thirds in that of the head, extends beyond 

 the middle of the orbit. Anterior teeth in the upper jaw widely set, much larger than the 

 posterior, which are close together and very small; the lower jaw with seven or eight dis- 

 tant teeth of moderate size on each side. Byes separated by a very narrow scaleless ridge, 

 their front margins l)eiiig nearly on the same level. Fin-rays scaly. The dorsal commences 

 a little before the upper eye, and teiiiiinates close by the caudal; its longest rays are be- 

 hind the middle, andone-lialf of tlu' length of the head. Anal spine none. Caudal rounded; 

 its length is one-sixth of the total. The pectoral is rather longer than half the length of 

 the head; ventral much shorter, extending beyond the origin of the anal. Gill rakers 

 lanceolate, pointed, one-third as long as the eye. 



Kadial formula: D. 7G-78; A. 00-63; L. lat. 47-50. 



Cohn-, grayish olive (in spirits); a series ot distant blackish sj)ots along the basal 

 portions of the anal and dorsal tins. 



The species has been taken on the Atlantic coast of tropi(;al America and on the west 

 coast of Africa. A single specimen was taken by the Bluko from station CCXLiv, in 23° 13' 

 N. lat., SQo 10' W. Ion., at a depth of 84 fathoms. 



CITHARICHTHYS DINOCEROS, Ooode aii.l Bean. 

 Citharkhtliys dinoceros, Goode and 15eax, Bull. Miis. Comp. Zoiil., xn, Nii. 5, 157. 



Greatest height of the body (40 millimeters) is contained 2.3 times in the total length, 

 and equals about 4 times the least height of the tail. 



Scales thin, deciduous, cycloid, large, 48 in the lateral hue, which is slightly curved 

 over the pectoral; 14 above and 16 below the lateral line. 



The length of the head (27 millimeters) is contained 3^ times in the total length, and 

 equals about 3^ times the diameter of the eye (8 millimeters). Tlie interorbital space is very 

 narrow, its width less than one-tifth diameter of eye; ridge ratlier prominent, narrow, sharp. 



The upper eye distant from profile l^y a space (2 millimeters) about onu-fonrth of the 

 orbital diameter. 



The length of the maxillary ( 12 millimeters) is less than half the length of the head ; that 

 of the mandible (16 millimeters) more than half, and twice the diameter of the eye. 



The teeth uniserial in both jaws, those in the front much the largest. A strong spine 

 upon the snout overhanging the upper lip (much lower than in C. unicornis). Above this 

 there is a second, shorter spine. 



The dorsal tin begins upon the snout in advance of eye upon blind side. 1 1 Is composed 

 of 91 rays, the longest somewhat behind the middle of the fin; its height (13 millimeters), 

 about equal to half the length of the head. 



The anal tin originates about undin- the origin of the pectoral; its distance from the 

 snout (30 millimeters) equals one-third of the total length. It is composed of 73 rays, and 

 is as high as the dorsal. 



Caudal subsessile, pointed, its length (17 millimeters) contained about 5J times iu total 

 length, and equaling twice the diameter of the orbit. 



