134 DEEP-SEA FISHES OF THE ATLANTIC BASIN. 



head is longer than the distance between it and the root of the ventral. The supramaxil- 

 lary reaches the vertical of the front margin of the eye. The dorsal is entirely behind the 

 ventrals; the anal commences as far behind the root of the ventrals as the latter is behind 

 the preoperculum; the pectorals nearly reach backward to the ventrals. The squamation 

 is similar to that of the A. macrochira. 



Kadial formula: B. 12; D. 1 10-11; V. I, 8. 

 The type of this description (No. 32281) was obtained by the Albatross at station 2037, 

 iat,, 3S° 53' N., Ion., 69=> 23' 30" W., at a depth of 1,731 fathoms. Others were obtained 

 from stations 2051, 1,100 fathoms; 2035, 1,362 fathoms; 2052, 1,098 fathoms. 



ALDROVANDIA PHALACRUS, (Vaillant). (Figure 156.) 

 Halosaurus phalacrus, Vaillant, Exp. Sci. Travailleur et Talisman, 185, pL xv, fig. 3; pi. xvi, figs. 1 — lc. 



In appearance and in general proportions this species approaches the Halosaurus 

 macrochir of Giinther, being, however, a little more slender, so that the height is less than 

 one-twentieth of the total length; the body is a little more compressed. 



The head is one-ninth of the total length; it is equally depressed below and notably 

 more elongate, so that the muzzle is spatuliform. The snout is three sevenths of the length 

 of the head, the preoral portion occupying its anterior third. The horizontal diameter of 

 the eye equals the width of the interorbital space and is one-seventh of the length of the 

 head. Scales on the operculum and the temporal region; upper part of the head naked. 



The origin of the dorsal is at a distance from the tip of the snout equal to the length of 

 the head. Pectorals not reaching to the insertion of the ventrals, which are at a distance 

 from the gill opening notably less than the length of the head; the ventrals are short and 

 placed in advance of the dorsal. This tish in the fresh state shows a flesh pink tint; the 

 anal dusky, approaching to brown; the head bluish black. Total length (millimeters), 430; 

 height, 20.04; thickness, 13.03; length of the head, 53.12; length of the snout, 21.45; diame- 

 ter of the eye, 8.15; width of interorbital space, 8.15. 



Radial formula: B. 10; D. 1, 9; A. 200; 1 V. 1, 7. 



The examples recorded by Vaillant are from oft' the coast of Morocco, Soudan, and the 

 Azores, in depths ranging from 1,103 to 2,220 meters. 



ALDROVANDIA GRACILIS, Goode and Bean, n. s. (Figure 157.) 



This is a very slender species and resembles H. rostratus, from which it differs in having 

 a larger eye, a smaller number of modified scales in the lateral line, and in having the vent 

 placed more posteriorly. The description is made from the Albatross specimen taken at 

 station 2380. The length of this individual is 490 millimeters. The greatest height of the 

 body (24 millimeters) is contained 204 times in the total length, and about 2i times in the 

 length of the head. The greatest width of the body (17 millimeters) is two-thirds of its 

 greatest height. The length of the head (GO millimeters) is contained s 1 , times in the total. 

 The greatest width of the head (17 millimeters) equals the length of the maxilla. 1 >istance 

 from the end of the mouth to the tip of the snout (11 millimeters) equals nearly one-fifth 

 the length of the head. The length of the snout (27 millimeters) is a little greater than 

 the length of the mandible. The width of the interorbital space (7 millimeters) is about 

 one-fourth the length of the snout and three-fourths the length of the eye. The maxilla 

 extends to slightly beyond the anterior margin of the eye; the mandible a little behind the 

 end of the eye. At present the head contains a few scales in several series behind the eye. 

 The diameter of the eye (9 millimeters) is equal to one-third the length of the snout, and 

 about two-fifths of the length of the postorbital part of the head. The mouth is rather 

 large. Teeth on the intermaxillaries and mandible in somewhat broader bands than those 

 on the maxilla. Vomerine patches broad, well separated in front. Tip of tongue free. 

 Integumentary flap not extending much beyond the margin of the subopercle. Branchi- 

 ostegals, 10; gill rakers, 2 above, 12 below, the longest scarcely half as long as the eye 

 The distance of the dorsal from the tip of snout (122 millimeters) is twice the greatest 



