IV CONTENTS. 



Family Daphniclpe 152 



Genus Moina 160 



" moinadaphnia 166 



" Ceriodaphnia 167 



" scapholkberis 174 



" SiMOCEPHALUS 177 



" Daphnia 181 



Family Bosniinklse 206 



Genius Bosmina 206 



Family Ijyncodaphnida^ 209 



Genus Macrothrix 211 



" Lathonura 215 



" Strebloceeus 216 



" Drepanothrix 217 



" Acantholeberis 218 



" Ofryoxus 218 



" Ilyocryptus 220 



Family Lynceidfe 224 



Sub-family Eurycercinaj 225 



Genus Eurycercus 226 



Sub-family Lyiiceinai 22,6 



Genus Camptocercus 227 



Sub-genus Acroperus 227 



" Camptocercus 228 



Genus Alonopsis 231 



" Leydigia 233 



" Graptoleberis 235 



" dunhevidia 236 



" Lynckus 237 



Sub-genus Alona 238 



Section A, Alona 238 



Section B. Alonella 249 



Sub-genus Pleuroxus 253 



Section A, Pleuroxus (verus) 253 



Section B, Leptorhynchus 260 



Genus Chy^dorus : 260 



" Anchistropus 264 



" MoNOSPiLUS 264 



Sub-order GY3INOMERA 266 



Family Polyplieinidae 266 



Genus Polyphemus 266 



" Bythotrephes 267 



" PoDON 268 



" Evadne 268 



Family Leptodorida^ 268 



Genus Leptodora 268 



Appendix to Part II. — Notes on the Cladocera of the southeastern part of the 



United States 269 



