26 5 _ 



Colour of shell whitish pellucid, tinged with pale yellow. 



Length of adult female scarcely exceeding half a millimeter. 



Remarks. Owing to a certain resemblance in the shape of the shell with 

 Sclerochilus contortus, the present form was at first by Brady and Robertson 

 erroneously regarded as merely or peculiar variety of that Cytherid. It is 

 however in reality very different and unquestionably a true member of the 

 genus Paradoxostoma, being apparently nearly allied to P. abbieviatum, though 

 well distinguished by the less compressed shell and by the deep sinus of the 

 ventral margin, as also by its much inferior size. 



Occurrence. \ have taken this form occasionally in some places on the 

 south coast of Norway, Ris0r, Korshavn, in the littoral zone among algae. 



Distribution. British Isles, Fosse de Cap Breton, Bay of Biscay. 



151. Paradoxostoma (?) rostratum, G. O. Sars. 



(PI. CXIX, fig. 3). 

 Para-ioxosioma rostratum, G. O. Sars, Oversigt af Norges marine Ostracoder, p. 97. 



Remarks. I do not find it appropriate here to give any detailed description 

 of this rather doubtful species, of which as yet only 2 detached valves (both 

 left) have come under my notice. Yet, for the sake of completeness, copies 

 of my original drawings are added on the accompanying Plate fig. 3. 



As to the systematic position of this form, I am by no means assured 

 that it in reality is referable to the present genus. The shape of the shell is 

 indeed rather dissimilar to that in the other known species, and bears some 

 resemblance to the shell in the genus Cytherideis ; but the inner duplicatures 

 are distinctly different, and in particular is their peculiar flexure at the interior 

 extremity very remarkable and unlike the case in any other Ostracod known 

 to me. Indeed, the true systematic i elation of the present form can only be 

 settled by an anatomical investigation of fresh specimens. 



Occurrence. The 2 detached valves originally examined by me were 

 found by my late .father in shell-sand from 0xfjord, West Finmark. In his 

 most recent publication 1896 Norman notes the finding of 3 specimens of 

 this peculiar form between tide marks at Vads0, without however giving any 

 further information about the species. 



Distribution. As yet only known from the Finmark coast. 



33 Crustacea. 



