LIST OF PLATES. 



'['he following- are the chief markings of the figures with their significations : 

 $: Female, 3* : Male./., r., (/.. c., fr.: left, right, dorsal, ventral, frontal views of 

 shell. V. 1., /:: left or right valve, fr. tn.: frontal margin of valve. muscl. sp.: muscular 

 spots, sclpt. : sculpture. #.: rostre. H.: hinge. E.: eye. oc.: ocellus,- .: tentacle. 

 a 1 : anterior antenna, a'': posterior antenna. /. /.: inner ramus. L.: anterior lip, M.: 

 mandible. //*.: maxilla, //.: maxilliped. p.: legs, urs.: urosome. C.: caudal lamella or 

 ramus, cop. app.: copulative appendages of male, P/. t.: ejaculatory tube, T.: testicle, 

 <S/).: Spermatozoida, ov.: ovarial tube. 



PI. I. 

 ( 'ypridimi norvegica. Baird. 



HI. II. 



Cypridina norvegica (continued). 



PI. lit. 

 Cypridina norvegica, female and male. 



PI. IV. 

 ( 1 ypridina megalops, (*. <>. Sars. 



PI. V. 



Philomedes globosus, (Lilljeborg). 



PI. VI. 

 Philomedes globosus (continued). 



PI. VIE. 



Philomedes glol)osus. male. 



PL VIII. 



Pliilomedes Lilljeborgi, G. (). Sars. 



PL IX. 

 Asterope Marire, (Baird). 



PL X. 



I. Asterope Marire (continued.). 



~2. Asterope al)yssicola. <J. <>. Sars. 



PL XI. 

 Conchoecia elegans, (J. O. Sars. 



PL XII. 

 Conchoecia elegans (continued). 



PL XIII. 



1. Conchoecia borealis. G. O. Sars. 

 ~2. ( 'onchoecia obtusatta. G. O. Sars. 



PL XIV. 

 Poly cope orbicularis, G. O. Sars. 



PL XV. 



1. Poly cope orbicularis, male. 



2. Polycope punctata, G. O. Sars. 



PL XVI. 



1. Polycope areolata. G. O. Sars. 



2. Polycope clathrata, G. 0. Sars. 

 ;5. Polycope pnstulata, G. 0. Sars. 



PL XVII. 



1. Polycope subkevis, G. 0. Sars. 



2. Polycopsis compressa, (Brady & llobertson). 



PL XVIII. 

 Cytherella abyssorum, G. O. Sars. 



PL XIX. 

 Cytlierella abyssorum (continued). 



PL XX. 

 Pontocypris trigonella. G. O. Sars. 



PL XXI. 

 Erythrocypris mytiloides, (Brady). 



