390 



in form, with one of the setae of the outer edge removed from the others and 

 attached in front of the middle; inner expansion of proximcnl joint narrowly 

 produced and extending considerably beyond the middle of the distal joint; 

 marginal setse 5 in number, the 2 innermost ones distinctly bifid at the tip. 

 Ovisacs of moderate size and sligthly divergent, each containing only a very 

 limited number of ova. 



Male exhibiting the usual sexual differences. Inner ramus of 2nd pair 

 of legs biarticulate, distal joint the larger and armed outside with an unusually 

 strong spiniform appendage blunted at the tip and accompanied by a much thinner 

 spine of about same length. Last pair of legs with the distal joint narrow sub- 

 linear in form; inner expansion of proximal joint armed with 2 subequal apical 

 spines, both bifid at the tip. 



Colour whitish. 



Length of adult female 0.98 mm. 



Remarks. The identity of the above-described form with that recorded 

 by Th. Scott as Stenhelia confusa would seem to be somewhat doubtful, as the 

 figures given by that author, especially those of 1st and last pairs of legs, 

 do not fully agree with those here reproduced. In every case it is closely allied 

 to that species, as also to A. typhlops, G. 0. Sars. From the latter it is chiefly 

 distinguished by the more prominent rostrum, the shape of the caudal rami and 

 that of the last pair of legs. The form recorded by Prof. Brady as Stenhelia, 

 MeeM seems to me to be referable to the same species. 



Occurence.- I found this form last summer rather abundantly in one 

 place, at Korshavn, south coast of Norway. It occurred here on a coarse sandy 

 bottom, at a depth of 40 50 fathoms, together with many other interesting forms 

 to be described in the following pages. 



Distribution. British Isles (Scott, Brady). 



Amphiascus typhloides, G. 0. Sars, n. s. 



(Suppl. PI. 24, fig. 1). 



Specific Characters. Female. Body comparatively slender, sub-cylindrical 

 in form, and only slightly tapered behind. Rostrum less prominent than in the 

 preceding species, but of a very similar form. Urosome about the length of the 

 anterior division, and having the last segment well developed. Caudal rami about 

 the length of the anal segment and of almost uniform width throughout, inner 

 cgde straight; apical setse slender, the inner medial one thickened in its prox- 

 imal part, and exhibiting at some distance from the base inside a peculiar nodi- 





