FEOM THE GULF OF GUINEA. 95 



processes. Anterior anteunfe not longer than the first thoracic segment, 8-jointed, the 

 proportional lengths as follows : — 



24 . 24 ■ 18 . 13 . 6 . 5 . 3 . 8 

 1 2 3 4567 8' 



The fourth joint bears a long sensory hair at its distal end, and two similar but rather 

 small hairs spring from the extremity of the last joint. Posterior antennjB slender, 

 3-jointed, the second and third joints subequal, the last terminating in one long and one 

 short, stout, claw-like seta ; the first joint bears at its distal end a small 1-jolnted secondary 

 branch possessing four apical setaj. The terminal joint of the first foot-jaws is slender, 

 and furnished with several long plumose hairs and at the extremity with three stout spini- 

 form setse. A stout sctiferous process springs from the end of the second last joint and 

 reaches to the end of the spiniform sette just described. Second foot-jaws 2-jointed, long, 

 and powerful. The hands possess strong curved terminal claws, bearing below the middle 

 portion one long and one short spinous seta. The Ijasal part of the hands is produced out- 

 ward into a stout, curved, spiniform process ; the hollow formed by this spiniform process 

 bears a peculiar dilated appendage, furnished with several small spine-like tubercles on 

 its outer surface. The inner margin of the hand is doubly and finely serrate. The 

 integument is closely beset with minute tubercles, much more prominent and distinct 

 than those of A. sphcerica. 



Habitat. Lagoon, Sao Thome Island, surface, January 27th (night collection). Specific 

 gravity of the water 1"0237 to 1'0255. One specimen only of this curious species was 

 obtained : I was able to prepare the foregoing diescription without dissecting it. 



The posterior foot-jaws in this species form powerfal gL'asping-organs. Thej)roduced 

 base of the hand acting as a sort of thumb and the terminal claw as a finger, with 

 the dilated appendage in the hollow at the base of the hand acting as an interlocking 

 arrangement, form together an elaborate and efficient instrument for grasping purposes, 

 such as I have not observed in any other described species. This curious and interesting 

 genus is represented in various and widely distant localities. It has been observed in 

 various parts of the North Sea, as at Heligoland, Christiania, and several places on the 

 English and Scotch coasts ; at Messina, Naples, and other localities on the Mediterranean 

 coast ( Ckms) ; in the Gulf of Mexico (Herrick) ; and on the "West Coast of Africa, as now 

 recorded. 



The species is named after my son Andrew Scott, who has assisted me so well with the 

 preparation of this Eeport, and who discovered the only specimen of this genus obtained 

 in the ' Buccaneer ' tow-nettinsrs. 



r>- 



Subfamily Stenheliin.e, Brady (1880). 



Genus Stenhblia, Bocck (1864). 

 Stenhelia, Boeck, Oversigt Norges Copepoder, 1864. 



Stenhelia accraensis, n. sp. (PI. X. figs. 2-12.) 



Length -85 mm. Body moderately robust ; first cephalothoracic segment considerably 



