393 



rather short and abruptly curved outwards. Eye absent. Anterior antennae com- 

 paratively small, but densely setiferous, 6-articulate, joints of proximal part suc- 

 cessively diminishing in size, the 4th being very short but considerably expanded 

 in front, terminal part distinctly biarticulate and about equalling in length the 3 

 preceding joints combined. Posterior antennae with the outer ramus well developed, 

 about equalling in length the distal joint, and composed of 2 well-defined joints, 

 the distal one the larger and carrying 4 setse, 2 lateral and 2 apical. Mandibles, 

 maxillae and anterior maxillipeds of a similar structure to that in the type species. 

 Posterior maxillipeds, however, much smaller, with the basal part rather narrow 

 and exhibiting a well-marked angular ledge inside, hand rounded oval in form. 

 1st pair of legs with the outer ramus shorter and narrower than the inner, middle 

 joint with a distinct, though small seta inside, last joint of about same size and, 

 as in the type species, armed with 3 spines and a slender geniculate seta; inner 

 ramus with the proximal joint considerably dilated and ciliated on both edges, 

 but without any seta inside, distal joint longer and much narrower than the 

 proximal one, carrying indside about in the middle a small seta, tip somewhat 

 obliquely truncated and armed with 3 spines successively increasing in length 

 inwards. Natatory legs very powerfully built, with both rami distinctly 3-articulate 

 and armed with unusually strong spines, last joint of outer ramus carrying 5 such 

 spines and a single very small seta inside; inner ramus in the 2 anterior pairs 

 of about same length as the outer and having the last joint spatulate in form, 

 with 3 strong spines at the end and a small seta inside; inner ramus of 4th pair 

 of legs shorter than the outer, with the last joint comparatively small and only 

 provided with 3 diverging apical spines. Last pair of legs imperfectly devel- 

 oped, each forming a thin lamella, sub-quandrangular in form, and edged 

 with 6 setse, the outermost of which is hair-like and attached at some distance 

 from the others. 



Colour yellowish white. 



Length of adult female 0.57 mm. 



Remarks. The above-described form, it is true, in some particulars differs 

 rather markedly from the type of the genus Stenheliopsis. Yet I think that it 

 more properly ought to be referred to that genus than to the genus Stenhelia, 

 as it agrees with the former in the structure of the mandibles and in the imper- 

 fect development of the last pair of legs. 



Occurrence. Only a solitary female specimen of this form has hitherto 

 come under my notice. It was taken in the Lyngen Fjord, near Farsund, from 

 a depth of about 60 fathoms, .muddy sand. 



r>2 Crustacea. 



