454 



DEEP-SEA FISHES OF THE ATLANTIC BASIN. 



total length of the body. The eyes are small, protruding, tbe upper almost perpendicularly 

 above, though perhaps slightly posterior to the lower. The diameter of the eye (2) equals 

 the width of the interorbital space (2) anil is double the distance (4) from the snout to the 

 upper eye, that from the snout to the lower eye (3) being intermediate. The nioutli is 

 small, the shape of the opening being somewhat like that in Solea, the upper jaw being 

 somewhat hook-shaped. The length of the upper jaw (4) is two-thirds that of the 

 mandible (6). 



The dorsal commences on the snout in advance of the eye, and is composed of !'<> to 

 102 long, flexible, simple rays, their tips apparently extending far beyond the connecting 

 membrane. The length of the longest rays (14) is double the least height of the body at 

 the base of the tail (7). 



The anal fin originates at a distance (22) from the snout contained four time* and one- 

 half in the length of the body. It is composed of 7G to 81 rays, the longest of which are as 

 long as the head. 



The pectoral is inserted close to the gill opening and far below the lateral line (midway 

 from the black stripe upon the lateral line to the black stripe at the base of the interspin- 

 ous processes of the anal fin). The pectoral upon the blind side is short, its length (2) 

 equal to the diameter of the orbit, composed of about four or five rays; that upon the col- 

 ored side longer, its length (3) equal to that of the snout, and composed of about twelve 

 rays. The ventrals are both crowded upon the ventral keel, their bases prolonged upon 

 the keel, their tips embracing the origin of the anal. 



Radial formula: D. 96-102; A. 76-81; P. 12 left, 4-5 right. 



Color: In life colorless, translucent. In alcohol yellowish white. Three prominent 

 blackish longitudinal stripes or lines upon the left side. The stripe running from the 

 branchial cleft to the base of the tail is less prominent than the two at the bases of the in- 

 terspinons processes. On the lateral line of the right side there is no stripe, though the 

 two lateral stripes are as prominent as upon the other side. Eyes black. 



Current number of specimen 

 Locality 



26,005 

 870, 871, and 872 



Milli 

 meters. 



Extreme length 



Length to end of middle caudal rav-s . . 

 Boch : 



< ireatest height 



Least, height of tail 



Head: 



Greatest height 



Distance from snout to upper eye . 



Distance from snout to lower eye, . 



Width of interorbital area 



Length of maxillary 



Length of mandible 



Diameter of orbit 



Dorsal (spinous) : 



Distance from snout 



Greatest height 



Anal: 



Distance from suout 



Height at longest ray 



Caudal length of middle rays 



Pectoral : 



Distance from snout 



Length . 



Ventral distance from snont 



Dorsal 



Anal 



Pectoral 



Number of scales in lateral line . 



loot lis of 

 length. 



32 



7 



4 



:i 

 2 



4 

 li 

 2 



2.5 



14 



22 



18 

 19 



18 

 3-2 



Hi 

 90 102 



70-81 



■ i, 4-5 i: 

 -12ii 



' Estimated from partial count. 



The type specimen of Monolene sessilicauda (Cat. No. 26004, U. S. ST. M.), .15<; meter 

 long, was taken by the Fish Hawlc, together with 10 other specimens, from station 870, in 

 40° 02' 30" N. hit.. 70° 22' 58" W. Ion., at a depth of 15.5 fathoms, and from station 871, in 

 40° 02' 54" N. lat., 70° 23' 40" W. Ion., at a depth of 115 fathoms. Examples were also 



