430 



quite incapable of swimming freely in the water, and keeps constantly at the bottom, 

 where it moves by winding its very flexible body and at the same time using its 

 powerful antennae and to some extent also the caudal rami as levers. 



Distribution. Liverpool Bay (Thompson, A. Scott), Scottish coast 

 (Th. Scott). 



Page 295. 



Eurycletodes similis (Scott). 

 Distribution. Polar Islands North of Grinnell Land (2nd Fram Exped.). 



Page 304. 

 Add the following species: 



Rhizothrix graeilis (Scott). 



(Suppl. PI. 48). 



Enhydrosoma gracile, Th. Scott, On some new and rare Crustacea, etc. 21st Ann. Rep. of the 

 Fishery Board for Scotland, Part III, p. 122, PI. II, figs. 1626, PI. Ill, fig. 1. 



Specific Characters. Female. Body comparatively slender, cylindric in 

 form, or very slightly tapered behind. Cephalic segment of moderate size and 

 not very deep, projecting in front to a broadly triangular rostral prominence. 

 Urosome comparatively short, scarcely exceeding half the length of the anterior 

 division, its last segment a little shorter than the preceding one. Caudal rami 

 comparatively small and somewhat contracted in their distal part, which is pro- 

 duced, outside the apical setae, to a bifid lappet, outer edge with a slender bristle 

 behind the middle, principal apical seta about the length of the urosome. 

 Anterior antennae rather small, though somewhat more slender than in the type 

 species, and, as in that species, composed of 4 joints only, the 1st of which is the 

 largest, 2nd and 3rd joints of about equal length, last joint rather smaller. 

 Posterior antennae with the distal joint short and armed outside with 2 thick 

 spines, at the end with 2 somewhat longer spines and 2 thin geniculate setae, 

 outer ramus very small, with 4 comparatively short bristles. Oral parts of 

 essentially the same structure as in the type species ; posterior maxillipeds however 

 comparatively more slender. 1st pair of legs with the rami less narrow than in 

 R. curvata, spine attached outside to the 1st joint of the outer ramus short, 

 inner ramus scarcely more than half as long as the outer; each ramus, as in the 

 type species, carrying on the tip 2 very slender setae terminating in a tuft of 

 spreading cilia. The 3 succeeding pairs of legs scarcely differing in structure 



