65 



his well-known monograph as Bairdia complanata, and subsequently recorded 

 by the present author under this name, is the very same species. 



Occurrence. Only a few female specimens of this form have as yet come 

 under my notice. They were taken, many years ago, at Bekkervig, west coast 

 of Norway, from the considerable depth of 150 fathoms. Norman has how- 

 ever recorded it from 3 other localities of the same coast. 



Distribution. Shetland Isles (Brady), Atlantic Ocean, down to 470 fathoms 

 (Brady), Mediterranean (G. W. Muller). 



10. Bythocypris obtusata, G. O. Sars. 



(PI. XXX, fig. 1). 

 Bairdia obtusata, G. O. Sars, Oversigt af Norges marine Ostracoder, p. 24. 



Specific Characters. Female. Shell somewhat less compressed than in 

 the preceding species, seen laterally, irregularly oval in outline, greatest height 

 in the middle and slightly exceeding half the length, dorsal margin evenly 

 arched throughout, ventral only very slightly sinuated, anterior extremity some- 

 what obliquely blunted below, with indication to an angle above, posterior 

 extremity with the lower corner only very slightly exerted; seen dorsally, oblong 

 fusiform in outline, greatest width in the middle and about equal to 2 /5 of the 

 length, both extremities obtusely pointed. Valves rather thin, but only little 

 pellucid, the left one overlapping the right almost along the whole dorsal face. 

 Structure of the several limbs vefy like that in the preceding species. Apical 

 setae of the anterior antennae, however, comparatively shorter, and the vibratory 

 plate on the 1st pair of legs (maxillipeds) of smaller size. Caudal rami some- 

 what less produced, and having the apical claws almost straight, seta of dorsal 

 edge accompanied above by a short bristle. 



Colour whitish, with a slight pale yellow tinge. 



Length of adult female 1.13 mm. 



Male unknown. 



Remarks. The above-described form is evidently congeneric with the 

 preceding one, though easily distinguishable by the somewhat different shape 

 of the shell. It is also rather inferior in size. 



Occurrence. At first I had at my disposal only an empty shell of this form 

 picked up by my late father from shell-sand taken up by the aid of the dredge 

 from a depth of 8090 fathoms at Abelsnses, south coast of Norway. Sub- 

 sequently however I succeeded in obtaining some perfect specimens in the same 

 locality where the preceding species occurred, and have thereby been enabled 



9 Crustacea. 



