Indidii iJeiip-nea Drcdijini]. l.'U 



45. Bathyclupea IIoskynii\ sp. n. 

 B. 7. D. 1(1 A. '^'^. P. 29. V. (). L. hit. circ. 38. 



Soft tissues fragile, bones thin. 



Head and body compressed ; the height of the latter abnost 

 exactly equals the length of the former, which is one third the 

 total without the caudal. Tiie median abdominal line vi 

 neither keeled nor serrated. The mucous cavities of the skull 

 are large. 



Snout rectangular, formed in front by the lower jaw, which 

 in repose is almost vertical ; its length, including the man- 

 dibular clement, is not quite equal to the diameter of the 

 large lateral circular eye, which is one third the length of the 

 bead ; the width of the flat interorbital space is half the 

 diameter of the eye. Nostrils small, almost superior. 



Mouth wide, its cleft antcro-lateral and nearly vertical. 

 The upper jaw, the length of which is two thirds that of the 

 bead, has tive sixths of its margin formed by the ])remaxillai 

 and one sixth by the maxilla3 on each side. Tlie last are 

 formed of three parallel longitudinal plates, of which the 

 posterior is slightly movable. Lower jaw excavated beneatli 

 by a deep wide mucous chaimel. Villiform teeth in narrow 

 bands in the premaxilla3, mandible, and palatine, and in an 

 inconspicuous V-shaped patch on the vomer. Tongue large, 

 bilobed. 



Gill-cleft very wide, the membranes entirely ununited ; 

 all the opercular bones well-developed, and the horizontal 

 border of the preoperculum sharply serrated ; four gills ; the 

 middle gill-rakers on the outer side of the first arch consider- 

 ably elongated ; pseudobranchiee large. 



Head naked. 



Body and nape covered with large cycloid scales, decidu- 

 ous everywhere except on the lateral line. In the largest 

 specimen a scale from the flank measures 10 millim. in the 

 vertical and 7'0 millim. in the autero-posterior diameter. 

 Each scale of the lateral line has a deep pocket on its inner 

 side which opens externally by numerous fine pores. 



The dorsal fin commences almost exactly midway between 

 the tip of the snout and the tip of the upper lobe of the caudal 

 fin ; the length of its base is equal to tliat of the snout ; it is 

 roughly triangular and its height is a filth greater than the 

 diameter of the eye. No adipose dorsal. The anal com- 

 mences about an eye-diameter in advance of the dorsal and 

 extends to within a very short distance (equal to three 

 fourths of an eye-diameter) of the base of the caudal. Caudal 



9* 



