472 DEEP-SEA FISHES OF THE ATLANTIC BASIN. 



PERISTEDION LONGISPATHA, GooDE and Bean. (Figure 386.) 

 Peristediiim longinpafha, GooiH': and Bean, Bull. Mas. C'oiiii). ZiiiU., xii. No. .'>, 166. 



Body liigb aiitedoiiy, its greatest lieigbt (39 iiiilliineters) coutained 4i times in total 

 length. The length of the head, without prolongations, is contained 2^ times in the total 

 length; with prolongation.s, 2 times. The crown of the head is flat, .separated fi-om the 

 nuchal plate hy a deep furrow, whic^h is convex forward. The interorbital si)acc is deeply 

 concave, the supraorbital margins being swollen; its widtli (IG millimeters) equal to the 

 long diameter of the orbit. No i)rotuberance on the forehead, which is much depressed, its 

 outline descending abruptly and rapidly in front of the eyes. A ridge, but no spine, 

 beneath the eye. Tlie length of the snout (49 millimeters), ineliiding the preorbital exten- 

 sion, is more than half the length of the head; the preorbital extension equals about half 

 the length of the snout. Tlie processes are Hat, rounded anteriorly, and covered with 

 minute granulations; they diverge considerably, the distance of the tips apart (30 millime- 

 ters), being nearly twice that at their bases (19 millimeters). A ridge arises at the base of 

 the ]n-eorbital process and extends to the angle of the preoperculum, and its width at the 

 angle (8 millimeters) is contained twice in the diameter of the orbit. A narrow inconspicu- 

 ous and interrupted ridge below. A ridge on the operculum, ending in a sharp spine at 

 the angle; its length is equal to the diameter of the eye. 



The jaws are feeble, toothless; the lower jaw with 2 long, much fringed Itarbels and 

 14 shorter ones. The length of the long barbels (32 millimeters), twice the diameter of the 

 eye. 



The maxilla does not quite reach the vertical through the anterior margin of the eye. 

 The diameter of the eye (10 millimeters) is contained 4 times in the length of the head 

 without its prolongations. The greatest width of the head over the preopercular ridge (61 

 millimeters) is <'ontained three times in the total length. 



The dorsal origin is directly in a line with the upi)er angle of the gill opening. The 

 longest spine (IS millimeters), slightly longer than the widtii of interorbital space. The 

 fin has 8+19 rays. 



The anal origin is under that of the second dorsal. Tlie fin has 19 rays. Caudal 

 small, slightly emarginate; the length of its middle rays (23 millimeters) equals 1^ times 

 the diameter of the eye. 



Ventrals slightly in advance of the pectorals and extending farther back, reaching 

 slightly beyond vent and to vertical througli seventh row of scales. 



Pectoral short, extending to vertical from fifth scale of the lateral line, the longest 

 detached ray to the sixth. Twenty-nine rows of scales. 



Color in life, bright roseate; a black blotch near the tip of the pectoral. Dorsal with 

 narrow dark margin; tip of caudal black. 



The elongation of the preorbital extension is noticeable in the smallest examples. 



This form was taken by the Blal-e, at stations LViii, off Havana, 242 fathoms (type); 

 LXII, off Barbados 209 fathoms; LXiii, otf Barbados, 209 fathoms; and by the Allmiroits, 

 at stations in the Gulf of Mexico as follows: 2397,280 fathoms; 2376, 324 fathoms ; 2358,222 

 fathoms. 



PERISTEDION IMBERBE, PoEY. 



J'cihledion imberhc, PoEY, Rep. Fis. Nat. Cuba, ll, 1866,158; 1868, 462; Mem. Hist. Nat. Cuba, ii, 367, 389. 

 I'eristedion micronermis, Poey, Ann. Lye Nat. Hist. New York, ix, 321. 

 Feristelhiis micronema. GuNTllEit, Challenger Report, XXII, 1887, 05. 



Body somewhat slender, its greatest height contained 4.J times in the distance between 

 the tip of the snout and the base of the caudal. Length of head, without prolongations, 

 contained 2i times in total length; with ])rolongati(nis, twice. Crown of the head fl:it; 

 interorbital space concave, with a depressed groove in its middle, branching iiosteriorly 

 along the base of the supraorbital crests; its width somewhat greater than the horizontal 

 diameter of the orbit. No protuberanc(^s on the forehead or on the snout above, and no 

 ridges or spines beneath the eye. The length of the snout, including the preorbital exten- 



