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CLADOCERA AND HALOCYPRIDA:—BRADY. 
KXPLANATION OF PLATES. 
Pirate XVI. 
Aychiconchoecia Miilleri 9°. 
. Shell, seen laterally. x 84. 
> dorsally. xX 84. 
. Anterior antenna with frontal stylet. x 240. 
. Inner branch of posterior antenna. x 240. 
. Biting portion of mandible. x 240. 
. Post-abdominal lamina. x 240. 
Archiconchoecia Aurore 9°. 
. Shell of female, seen laterally. x 30. 
. Anterior antenna and frontal stylet. x 84. 
. Inner branch of posterior antenna. x 84. 
Simocephalus gelidus 9°. 
. Female, seen laterally. x 40. 
7 ventrally. x 30. 
. Post-abdomen. x 84. 
. Spines of the same. X 240. 
Puate XVII. 
Conchoecia hettacra. 
. Shell, seen laterally, male. x 33. 
. Anterior antenna and tentacle, male. x 84. 
», seta, more highly magnified. . 
. Inner branch of posterior antenna, male. x 84, 
” ” ” female. x 84. 
. Biting portion of mandible. x 84. 
Conchoecia parthenoda 2°. 
. Shell of female, seen laterally. x 84. 
. Anterior antenna and tentacle, female. » 240. 
. Inner branch, posterior antenna.  X 240. 
. Biting portion of mandible. x 240. 
Conchoecia serrulata. 
Shell of female, seen laterally. x 40. 
Portion of ventral margin. x 84. 
Shell, seen dorsally. x 40. 
Vou. V, Parr 4, 
