DISCUSSION OP SPECIES AND THEIR DISTRIBUTION. 135 



lengtli of the head. The length of the base (17 millimeters) is two-thirds of the height of 

 the body. The longest ray is two-tlfths as long as the head and nearly equal to the height 

 of the body, about 34 rows of scales in front of the dorsal. The ventral is entirely in 

 advance of the dorsal; its distance from the end of the head (49 millimeters) equal to the 

 distance from tlie tip of the mandible to the end of the head. The length of the ventral 

 (18 millimeters) is about equiil to that of the dorsal base and twice the length of the eye. 

 The origin of the ventral is about under the twenty-eighth row of scales. The distance of 

 the vent from the origin of the ventral (06 millimeters) is greater than the length of the 

 head; it is close to the anal origin. The distance from the dorsal origin to that of the anal 

 (53 millimeters) equals 3 times the length of the dorsal base. Nine or 10 enlarged scales in 

 the lateral line in front of the ventral origin and about the same niunber between the 

 ventral and the vent. 



The dorsal is scaly, less than one-half of its height; about 12 rows of scales between 

 the dorsal origin and the lateral line, and only about two rows below the lateral line. 



Scales silvery, the light orange-brown body color showing through them. Branchios- 

 tegal membrane bluish; inner surface of gill covers nearly black; inside of mouth bluish. 



Three specimens are known, one obtained by the BlaJce, at Station Lxx, off Guadaloupe, 

 769 fathoms; one at station 2380 by the Albatross, and another at station 2381 by the same 

 vessel. Station 2380 is in N. lat. 28° 02' 30", W. Ion. 87° 43' 45", from 1,430 fathoms. Sta- 

 tion 2381 is in N. lat. 28© Oo' 00", W. Ion. 87° 56' 15", 1,330 fiithoms. 



It is not impossible that this species may be identical with H. Johnsonianus of Vaillant, 

 but the types of the French naturalist were so much mutilated that his description is not 

 sufficient to establish the relationship. 



ALDROVANDIA PALLIDA, Goode and Bean, u. s. (Figure 158.) 



Greatest height of the body at origin of the dorsal and is contained 15 times in the 

 total length, and is about one-half the greatest length of the head, which is, including 

 the subopercular flap, 78 millimeters, and contained about 1'} times in the total length. 

 The greatest width of the body (21 millimeters) is a little more than one-half its greatest 

 height. The greatest depth of the head (24 millimeters) is a little less*than one-third of its 

 length and nearly equal to its greatest widtli. The head is naked, with the exception of a 

 patch of scales beginning behind the eye; its greatest width (10 millimeters) nearly equal 

 to one-half the width of the body. The eye is midway between the tip of the snout and the 

 end of the head. Its long diameter (11 millimeters) equal to one- third the lengtli of the 

 snout (33 millimeters), also equal to the width of the interorbital space. The nostrils are 

 close to the front of the eye, the anterior in a short tube, which ends in a little pointed flap; 

 the posterior larger, nearly elliptical in shai)e. The distance from the front margin of the 

 mouth to the tip of the snout (10 millimeters) equals nearly one-half the length of the snout. 

 The maxilla extends to below the front margin of the eye. Teeth in broad, villiforin bands 

 on the intermaxillaj mandible, and vomer; in narrower bauds on the maxilla and palatines. 

 End of the tongue barely free. The integumentary flap projecting beyond the margin of 

 the suboperculum. The dorsal originates about over the end of the base of the ventral. 

 Its distance from the tip of the snout a little more than twice the length of the head. The 

 length of its base (23 millimeters) nearly equal to the greatest depth of the head. The basal 

 half of the tin is profusely covered with scales; it consists of two simple and nine divided 

 rays. The longest dorsal ray (30 millimeters) equals three-toiirths the greatest height of 

 the body. The last ray (12 millimeters) is two-fifths as long as the third. The ventral is 

 distant from the snout a space about equal to twice the length of the head. It consists of 

 two simple and seven divided rays; the longest ray (23 millimeters) equal to base of dorsal. 

 The pectoral is placed above the middle of the body not far from the head. Its length (35 

 millimeters) equal to one-half the distance of its base from the (u-igiii of the ventral ; it reaches 

 to about the seventeenth row of scales. The vent is under the sixty-third scale of the lateral 

 line ; there are about 12 rows of scales between the origin of the dorsal and the lateral line 



