868 MRS. E. AV. SEXTON ON AMPIIIPODA [NoV. 23, 



inner tridentate portion intact; from Bonnier's description and 

 figure I should imagine tbe same accident had occuri'ed to his 

 specimen. Tlie spine-row in all three contained 4 spines. The 

 bristles of the 2Dd joint of the pa^jO are pkimose ; those of the 3rd 

 serrate, the two apical ones much longer than the others. 



Maxilla 1. Female. — Inner plate with 2 large plumose setae and 

 several fine hairs; outer plate with 11 strongly denticulate spines, 

 arranged in two rows on the apex, 6 in one row, longer than the 

 othei'S, with 4 or 5 teeth on each spine ; the spines of the other 

 row have only 1 or 2 teeth apiece (cf. lihachotropis rosirata, 

 fig. 55). Bonnier's specimen had " huit dents barbelees toutes 

 semblables." On the inner margin of the palp the set83 are 

 ari'anged in two parallel rows, bases contiguous, apices widely 

 divergent. 



Maxilla 2. Female. — Both plates nearly covered with fine hairs. 



Maxillipeds. Female (fig. 40). — Resembling E. propincp.ms, as 

 figured by Sars ; easily distinguished from all the other species of 

 Eusirus by the fan-shaped groups of exceedingly long, flexible, 

 plumose setaa on the outer sui'face of the Isb and 2nd basal joints. 

 Each seta has a broad pellucid shaft, with several longitudinal rows 

 of delicate hairs running the whole length. There are two groups 

 on each joint; those on the 1st joint containing 16 seta? in each 

 fan and extending to beyond the middle of the 2nd joint of the 

 palp ; those on the 2nd joint each with 14 setae, much smaller, set 

 more closely together, only reaching to the 1st joint of the palp. 



Gnatliopocls 1 & 2. Female. — The figure given by Bonnier is that 

 of the first gnathopod, but through an error it is marked as the 

 second. The second gnathopod (see text-fig. 278, p. 866) is longer 

 than the first, the 2nd joint, for example, being as long as the 

 2nd and 3rd taken together of the first. The 4th joint is more 

 produced posteriorly, forming a distinct lobe ; both this and the 

 more acute lobe of the 5th joint are provided with numerous 

 finely serrate cleft bristles. The hand is longer though no wider 

 than that of the first, the palm with a densely crowded row of 

 small setfe on either side of the margin, about 60 on the inner 

 side and 40 on the outer, with a few widely spaced setae above. 

 The posterior angle of the palm is bordered with 6 or 7 large 

 sensory spines, and at the articulation of the finger is a large 

 plumose specialised bristle (cf. also E. longipes, Rhachotrojyis 

 rostrata, R. helleri, &c.). In the abnormal specimen there are 

 only 25 small seta? on the inner margin and 27 on the outer. 



First and second x)&'>'(^opods. Female. — Bonnier says of his 

 specimen (p. 652) : " le meropodite n'est pas plus long que le 

 carpopodite " ; the ' Huxley ' specimens differ from this, having 

 the 4th joint longer than the 5th, as in all the other known 

 species of Eusirus. 



Third pleon segment. Female. — Hind margin nearly straight, 

 with 23 down-turned serrations turning the corner ; posterior 

 angle rounded ; lower margin produced to a strong denticle 

 behind ; 1 1 spinules inset submarginally. 



