370 Dr. T. Scott on some 



stout and elongated, but the others are small, and the pen- 

 ultimate joint is only about half the size of the one on either 

 side. The formula shows approximately the proportional 

 lengths of the various joints : — 



1 .2.3.4.5.6.7.8. 9 

 20 20 21 19 10 8 6 3 5' 



The outer ramus of the posterior antennae is very small, 

 slender, and two-jointed. Posterior maxillipeds stout ; hand 

 subglobular, with the palm hollowed out and fringed with 

 small denticles ; terminal claw curved and tolerably strong. 

 First pair of legs moderately slender and elongated, inner 

 ramus rather longer than the proximal joint of the outer, 

 and both rami are armed with short and stout terminal claws 

 (fig. 4). The next three pairs normal. The fifth pair are of 

 moderate size, the proximal joint foliaceous, subtriangularin 

 outline, and with the inner distal end somewhat produced, 

 narrowly rounded, and provided with four setae arranged as 

 shown in the drawing ; distal joint oblong, width equal to 

 fully half the length, and with the angular extremity 

 furnished with five setae (fig. 7). 



Length '7 mm. (about g^ of an inch). 



Male. — The male is rather smaller than the female and 

 with the antennules modified for grasping. The outer 

 ramus of the second pair of thoracic legs is stout and the 

 joints are subequal, but the middle one is slightly larger 

 than the first or third ; the third joint has also the extremity 

 abruptly and somewhat obliquely truncated ; the inner ramus 

 is about as long as the outer, but is not so stout, and the 

 second joint is produced on its inner aspect into a long 

 spiniform process extending beyond the end joint, which is 

 small and narrow. The rami of the third pair are also nearly 

 equal in length, but the outer is somewhat longer than the 

 inner and tolerably stout, the proximal joint is rather longer 

 than the others, and the end joint is obliquely truncated ; 

 the inner ramus is moderately slender. Fifth pair with the 

 proximal joint obsolete or nearly so ; the end joint is oblong 

 and its width equal to rather more than half the length ; the 

 end is broadly rounded and furnished with five elongated 

 setae, four of them being tolerably stout and spiniform ; the 

 margins of the joint are also fringed with small spinules 

 (tig. 8). 



Hab. Collected in the vicinity of the Falklands by tow-net 

 in November 1909. 



This species has a resemblance to Harpactlcus flexus, 



