160 



At first I erroneously referred it to the genus Cyprideis and described is as new 

 under the name of Cyprideis Bairdii. 



Occurrence. This is one of our commonest Cytheridae, being found rather 

 abundantly around the whole of the Norwegian coast in moderate depths. It 

 shares with some other Cytheridae the particularity that, when coming in con- 

 tact with the air, it remains floating on the surface, and may thus be easily 

 picked up from the samples examined. 



Distribution. British Isles, Iceland, Greenland, Spitsbergen, Gulf of St. 

 Lawrence, Franz- Josef Land. 



Fossil. France (tertiary), Norway (glacial and postglacial), Scotland, Canada. 



70. Cytheridea punctillata, Brady. 



(PI. LXXIV, fig. 2.) 



Cytheridea punctillata, Brady, Ann. Mag. Nat. Hist. Vol. XVI, p. 189. PI. XXV11I, figs. 1720. 



Syn : Cyprideis proximo, G. O. Sars. 



Specific Characters. Female. Shell, seen laterally, subovate or somewhat 

 triangular in shape, much higher in front than behind, greatest height considerably 

 exceeding half the length, dorsal margin boldly arched in front, with indication 

 of an angle above the eyes, thence sloping gently behind and joining the hind 

 edge by an even curve, ventral margin very slightly sinuated, anterior extremity 

 broadly rounded, posterior much narrower and somewhat obliquely blunted, 

 with the lower corner scarcely exerted and obtuse; seen dorsally, regularly 

 oblong oval in outline, with the greatest width about half the length and both 

 extremities bluntly pointed. Surface of shell of a dull appearance, being marked 

 everywhere with closely set small rounded pits, and moreover exhibiting a 

 number of tubercles or papillae, which however are of smaller size and less 

 conspicuous than in the preceding species; extremites finely hairy. Anterior 

 antennae less robust, with the distal segment of the basal part scarcely longer 

 than the terminal part, middle joint of the latter more prolonged, last joint 

 very small. The other appendages of a structure very similar to that in the 

 preceding species. 



Afa/. Shell considerably more elongate than in female, with the greatest 

 height scarcely exceeding half the length. Right 1st leg less powerfully developed 

 than in C. papillosa, with the 1st joint of the terminal part well defined and 

 armed at the end anteriorly with a strong spine, the other 2 joints confluent; 

 apical claw far less strong. Right 2nd leg exactly of same appearance as in 

 the said species. Left 2nd leg likewise rather similar, though somewhat less 

 powerful. Copulative appendages with the basal part rounded quadranguh 



