FROM THE GULF OF GUINEA. 11!) 



its inner margin, and interiorly with tliree setiferous spines. Maxillse simple, 

 terminating in two very short and rounded spiniferous lohes (tig. 3i). The anterior 

 foot -jaws are furnished with a short, stout, and slightly curved terminal claw, which is 

 provided Avith several setiferous spines at the base, while two stout setiferous sjiines 

 spring from the end of the tirst joint ai\d close to the basal part of the claw. The 

 posterior foot-jaws are large ; they arc furnished with several spiniform plumose setae on 

 the inner margin, and terminate in stout, elongate, and strongly curved claws, from the 

 base of which springs a strong and curved claw-like spine (fig. 35). Both branches of 

 the first four pairs of swimming-feet 3-jointed ; joints short and broad. The exterior 

 margin of the outer branches of the first pair is furnished with four spines, — one on 

 each of the first and second, and two on the last joint. Hound the end and inner margin 

 of the last joint there are six long plumose setae, while one long seta, also plumose, 

 springs from the inner distal angle of the second joint. The first and second joints of the 

 inner branches have no spine on the outer margin ; the outer distal angle of the second 

 joint forms a tooth-like process; the last joint is furnished with a stout spine on the 

 lower half of the exterior margin, — the margin being hollowed out to receive the base of 

 the spine; there are also five plumose setae round the end and inner edge of the last 

 joint. The extremities of both branches of the second, third, and fovxrth pairs are 

 armed with one long and one short spine ; the long sj)ine of the outer branches is ciliate 

 along the inner edge (tig. 37). The foot of the fifth pair consists of a broad foliaceous 

 joint, rounded at the extremity, and furnished with one long terminal and three small 

 submarginal setse (fig. 38). Abdomen composed of four segments; the first is con- 

 siderably dilated, the first, third, and fourth are about equal in length, but the second is 

 rather longer. Caudal stylets half as long again as the last abdominal segment, some- 

 what divergent, and furnished AA^th two long and three short terminal set£e ; there is also 

 a small submarginal spine about one-third the length of the stylet from the extremity 

 (fig. 31). 

 Habitat. Loanda Harbour ; surface tow-net gathering, collected February 15. 



Genus Pachysoma, Claus. 

 Pachysoma, Claus, Die freilebenden Copepoden, 1863. 



Pachysoma punctatum, Glaus. (PI. XIII. figs. 18-21.) 



1863. Pachysoma jMnctatiim, Claus, op. cit. p. 163, pi. xxv. figs. C-11. 



Length 2"5 mm. Body rotund; forehead produced into a small triangular pointed 

 rostrum. Anterior antennae very short, stout, 7-jointed, the third and fourth joints 

 shorter than the others ; the proportional lengths of the joints are as follows : — 



3 .2.5. 9 .12. 22 . 20 . 1 .5 

 1 2 3 4 5 6 7 ' 



Posterior antennae nearly as in Liohomolgiis, 1-jointed, the third joint short, the others 

 of moderate length and subequal (fig. 20). Mandibles small, stylet-shaped, ciliate along 

 one edge ; the maxillae consist of small 1-jointed appendages bearing two long apical 



