PLATE XXXI.a. 
Ceriodaphnia affinis, Lilljeborg. 
FIG. 
1. Ephippial female x 38. 
2. Anterior antenna of female x 212. 
3. Anterior antenna of male x 212. 
4, Postabdomen of female x 106. 
Scapholeberis mucronata, Miiller. 
5. Female x 38, 
6. Postabdomen of female x 106. 
Cyclops nanus, G. O. Sars. 
7. Female x 38. 
8. Tail x 106. 
9. Anterior antenna x 106. 
10. Receptaculum x 212. 
11. First foot x 212. 
12. Fifth foot x 212. 
Macrothriz laticornis, Jurine. 
13. Female x 87. 
14, Anterior antenna of female x 212. 
15. Postabdomen of female x 212. 
Alona tenuicaudis, G. O. Sars. 
16. Female x 87. 
17. Postabdomen of female x 212. 
