258 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
EXPLANATION OF PLATES. 
Plate XXXVII. 
Fig. 1. Daphnia pulcx, var. pulicaria. Male. 
Fig. 2. Daphnia dentifera. 
Figs. 3, 4. Cypris barbatus. 
Plate XXXVIII. 
Figs. 5-8. Cypris barbatus. (5) First antenna. (6) Second antenna. (7) Postabdomen. (8) Man- 
dible. 
Plate XXXIX. 
Figs. 9-12. Cyclops thomasi. (9) First leg. (10) Second leg. (11) Third leg. (12) Fourth leg. 
Plate XL. 
Fig. 13. Cyclops thomasi, fifth leg. 
Figs. 14-17. Cyclops capilliferus. (14) Adult female. (15) First leg. 
leg. 
Plate XLI. 
(16) Fourth leg. 
(17) Fifth 
Fig. 18. Cyclops capilliferus, antenna of female. 
Figs. 19-21. Epischura nevadensis, var. columbice. (19) Abdomen of male. (20) Fifth pair of legs 
of male. (21) Fifth pair of legs of female. 
Fig. 22. Diaptomus piscinae, fifth pair of legs of male. 
Plate XLII. 
Figs. 23-25. Diaptomus shoshone. (23) Fifth pair of legs of male. (24) Fifth leg of female. 
(25) Right antenna of male. 
Figs. 26-28. Diaptomus lintoni. (26) Fifth leg of female. (27) Fifth pair of legs of male. (28) Ter- 
minal segments of antenna. 
