24 



Length of adult female amounting to 2.30 mm., that of male about the same. 



Remarks. The present species may be easily recognised from its nearest 

 allies by the comparatively very narrow, almost cuneiform shape of the shell 

 and by the rather prominent dentated upper posterior corner. The form 

 recorded by Glaus as Paraconchoecia gracilis is unquestionably identical with 

 the present species, and this is also the case with Conchoecia quadrangularis 

 of Aurivillius, this species being only founded on immature specimens of 

 C. elegans. On the other hand it seems to me rather questionable, if the 

 form taken in the antarctic Ocean, and recorded under the latter name, is in 

 reality identical with the northern form, though the identity has been admitted 

 by Dr. Skogsberg. 



Occurrence. I have met with this handsome species in several places on 

 the Norwegian coast, from the Chri'stiania Fjord up to the Lofoten islands, 

 but, as a rule, only in greater depths beyond 100 fathoms. The most suitable 

 method for catching it, is to attach a tow-net to the dredging line, at some 

 distance from the dredge or from a heavy lead to be dragged along the bottom. 

 In the tow-net thus several bathypelagic animals will be collected, an among 

 them the present Ostracod may often be found in great numbers. The move- 

 ments of the animal are exceedingly rapid and effected in adrupt bounds. I 

 have not observed any phosphorescence in the specimens examined by me in 

 the living state. 



Distribution. West coast of Sweden (Skogsberg), British Isles (Brady), 

 Arctic Sea (Auiivillius) Atlantic Ocean (Glaus). 



8. Conchoecia borealis, G. O Sars. 



(Pi. XIII, fig. 1). 

 Conchoecia borealis, G. O. Sars, Oversigt af Norges marine Ostracoder, p. 119. 



Specific Characters. Female. Shell, seen laterally, oblong subquadran- 

 gular in outline and rather expanded behind, greatest height nearly attaining 

 half the length, dorsal margin horizontal with a slight depression in the middle, 

 ventral margin strongly curved in its posterior part, but in front of the middle 

 more or less distinctly sinuated, posterior extremity broadly truncated, with the 

 lower corner evenly rounded off, the upper not produced, obtuse; seen 

 dorsally, oblong oval in shape, with the greatest width about in the middle 

 and somewhat exceeding l h of the length, anterior extremity sub-truncate at 

 the end, posterior much contracted. Rostral projections rather smaller than in 

 the preceding species and less vaulted above, subjacent sinus about as in that 



