FEOM THE GULF OF GUmEA. 107 



bear each two similar filaments or " sensory liairs," one of which on both seg-mcnts is 

 longer and stouter than the other. In the male the third (?) and last joints are hinged, 

 and the fifth hears a spiuiform ajipendage. The posterior antennte are of moderate length 

 and 3-jointed (Clans says 4-jointed, and the hasal joint of some of the ' Buccaneer ' 

 specimens has a faint line, requiring the |-inch objective to see it, crossing the basal 

 segment near the middle, which may be a pseudo-joint ; hut there are certainly only 

 three distinct jo'mts in all of the ' Buccaneer' specimens examined), having at the distal 

 end of the first segment a 1-jointed rudimentary branch bearing two long terminal 

 plumose setae. The lower margin and the distal half of the surface of the last segment 

 of the primary branch is setose ; the upper edge of the same segment hears one, and at 

 the extremity five setae. Mandibles small, basal part somewhat dilated, the upper part 

 slender, with the extremity furcate or obscurely digitiform; the mandible-palp absent or 

 very rudimentary (no palp was observed in any of the ' Buccaneer ' specimens, though 

 they were dissected with the greatest possible care). Maxillae rudimentary, bearing two 

 terminal spiniforni seta?, and one seta near the middle of the basal part. Anterior foot- 

 jaws small ; the end joint with three terminal spiniform setae, the middle one being the 

 longest. Thei-e is at the end of the basal segment a lu-oportionally large marginal 

 process bearing thi-ee terminal spinif or tn hairs, which imparts to the anterior foot-jaws the 

 appearance as if they were 2-branched; a long, slender, marginal hair springs from 

 the i^roximal half of the basal joint. Posterior foot-jaws in the male large, composed of 

 two long segments and a long, curved, terminal claw, nearly as long as the second 

 joint, and forming a powerful prehensile organ ; the upj^er margin of the second 

 joint is finely serrate. The jjosterior foot-jaw in the female, which is also 2-jointed 

 (PI. XII. tig. 50), is shorter and more slender than that of the male, the terminal claw 

 being also short and feeble, the length of the whole ajjpendage being little, if at all, 

 longer than the first joint of the male cxppendage (Prof. Brady describes, loc. cit., the 

 posterior foot-jaws as possessing a rudimentary third joint, but no such joint was observed 

 in the ' Buccaneer ' specimens). First pair of swimming-feet 2-branched, inner branches 

 3-jointed, the last joint being the shortest ; outer branches 1-jointed, rather longer than 

 the first joint of the iimer branches. All the joints are furnished with long plumose 

 hairs ; a single plumose hair springs from the outer margin of the second basal joint. 

 Second, third, and fourth pairs nearly alike, also 2-branched, both branches 3-jointed, 

 joints subequal ; the outer branches rather shorter than the inner ones, all well furnished 

 with long plumose setae. Fifth pair of feet 1-branched, 2-jointed, slender, the second 

 joint twice the length of the first, bearing a long, slender, setiferous, terminal spine, and 

 a similar one on the iimer margin near the extremity of the joint; four short spinous 

 hairs spring at irregular intervals along the outer margin ; there is also a slender hair on 

 the outer margin and near the distal end of the first joint. The preceding description 

 of the five pairs of feet applies to both sexes. Ova not apparently enclosed in a sac, but 

 forming a single cluster somewhat similar to that of Eaclueta marina. 



Habitat. Station 2, surface, January 1st (night tow-netting). Station 9, 50 fathoms, 



14* 



