192 



rior maxillipeds terminating in a well-developed prehensile hand. 1st pair of legs 

 with the inner ramus biarticulate and not prehensile. Natatory legs not very 

 different in structure from the 1st pair, all having the inner ramus biarticulate 

 and much coarser than the outer. Last pair of legs very small, distal joint quite 

 rudimentary and not defined at the base; proximal joint only slightly expanded 

 inside. Ovisacs small, containing a very limited number of ova. Male unknown. 

 Remarks. This new genus is somewhat allied to Stenhelia, but differs 

 very materially in several of the anatomical characters. It contains as yet only a 

 single species, to be described below. 



127. Stenheliopsis divarieata, G. 0. Sars, n. sp. 



(PI. CXXV, fig. 2). 



Specific Characters. Female. Body short and stout, with the anterior 

 division considerably dilated, the posterior rather narrower. Cephalic segment 

 very large and vaulted above. Rostrum rather prominent, forming a very thin 

 linguiform plate, evenly rounded at the tip. Urosome almost as long as the an- 

 terior division, and only slightly attenuated behind, genital segment scarcely at 

 all dilated in front. Caudal rami exceedingly slender and elongated, attaining 

 about half the length of the urosome, and curving outwards, apical setse extended 

 laterally, the innermost but one rather coarse, with the distal part closely annul- 

 ated and clothed with short cilia; outer edge of the rami carrying a short seta 

 at some distance from the tip. Eye wholly absent. Anterior antenna abruptly 

 curved in their outer part and densely setiferous, 6-articulate, the first 2 joints 

 much the largest, and together about twice as long as the remaining part, 4th 

 and 5th joints very small, terminal joint long and narrow. Posterior antenna^ 

 with the distal joint fully as long as the proximal one. outer ramus scarcely more 

 than half as long, and provided with 6 setse, 4 of which belong to the distal joint. 

 Mandibular palp with the basal part comparatively short and broad, rami a little 

 unequal, the inner one being the larger, both clothed with simple setae. 1st pair 

 of legs with the 2nd basal joint produced at the end inside to a conical process 

 carrying a strong deflexed spine, outer ramus narrow, with no seta inside the 

 middle joint, last joint somewhat larger and armed with 3 spines and a slender 

 seta; inner ramus about the length of the outer, but somewhat broader, proximal 

 joint without any- seta inside, distal joint a little longer and narrower, and pro- 

 vided inside in front of the middle with a small seta, tip carrying 2 unequal 



