328 DR. H. J. HANSEN ON THE [Nov. 29, 



Antennulse have the second joint of the peduncle a little 

 shorter than the third and rather slender ; flagellum in the male 

 about as long as the sum of the two proximal joints of the peduncle, 

 six-jointed. 



Antennse, — Basal joint is distally cut oft* transversely, its outer 

 angle without any process measuring more than 90°. 



First thoracic legs very difierent in the two sexes. — In the adult 

 male they are robust and elongate, a little longer than thorax. 

 Third joint is oblong, gradually expanded above and produced 

 into a rather large, oblong, acute process directed forward ; fourth 

 joint very large, gradually much expanded above and produced 

 into a large plate-shaped process with the end acute ; upper margin 

 and inner side of the expanded part of third and fourth joints 

 with numerous exceedingly long hairs. Fifth joint very large, 

 without dorsal process but strongly expanded below, forming a 

 large subtriangular plate which is slightly produced below in 

 front, with the lower anterior angle rounded and the distal 

 margin nearly as long as the joint ; the upper part of the joint 

 is distally vaulted on the exterior side and situated in a much 

 higher plane than the large lower part, which is a thin plate ; 

 in this way a kind of excavation, sharply marked oft" above, 

 is formed on the outer side of the joint, and the hand can be 

 turned downwards and backwards so that a portion of its inner side 

 becomes overlapped by the thin plate of the fifth joint ; the lower 

 margin and inner side of this thin plate are furnished with hairs 

 and setfe of very moderate length. The hand is large, not very 

 long but very deep, about -i as long as deep ; from the basal articu- 

 lation it expands suddenly and strongly downwards so that a free 

 and rather long posterior margin is formed, and the posterior 

 angle is broadly rounded ; the upper margin is feebly convex, 

 the lower margin somewhat shorter than the distal end ; the 

 palmar edge is very oblique, with two teeth above the middle and 

 a rather small spine at the lower angle which is produced into a 

 triangular tooth ; at the palmar edge and on the lower margin a 

 number of setfe of very moderate length. Seventh joint with 

 the claw claw-shaped, rather small and not reaching the lower end 

 of the palmar edge ; lower margin of the joint with a row of fine 

 spines. — In the female the first legs are very much smaller than in 

 the male, not elongate. Third and fourth joints as to shape and 

 hairs essentially as in the male, yet somewhat shorter in pro- 

 portion to length ; fifth joint similar to that in the other sex, 

 but the upper angle is produced into a rather short acute process, 

 and the lower plate-like expansion is narrower as compared with 

 the upper portion, which is rather feebly vavilted. The hand is 

 nearly twice as long as deep ; the lower margin is rather convex 

 in its proximal half, but a posterior margin, as found in the male, 

 is not developed ; the palmar edge is very oblique, and the angle 

 between this edge and the lower margin measures nearly 130°, 

 the edge shows a rudimentary tooth, several stifi" setfe pectinate 

 above, and at the lower end a notch so that the usual strong spine 



