PLATE V. 



Figs. 1, 2. Conchcecia pacifica. 



1. Shell of male. X 36. 



2. Shell of male, ventral view. X 3G. 



Figs. 3, 4. Conclioecia clausii. 



3. Shell of female. X 85. 



4. Antennule and frontal organ of female. X 142. 



Figs. 5-7. Conchcecia miilleri. 



5. Antennule and frontal organ of male. 28. 



6. Frontal organ of female. X 72. 



7. Laminated portion of third seta of male antennule. X 



390. 



[34] 



