138 Wisconsin Academy of Sciences, Arts, and Letters. 
Turbellaria 
Planaria maculata Leidy 
Nematoda 
Genera et species undetermined. Very small worms. 
Stylaria lacustris (Linn). 
Naias sp? 
Dero sp? (Winnebago only) 
Sparganophilus eiseni Smith (Lake Butte des Morts only). 
Limnodrilus species, possibly hoffmeisteri Claparede. 
Lumhriculus probably inconstans Smith. 
Hirudinea 
Glossiphonia complanata (Linn). 
Glossiphonia nepheloidea (Graf). 
Glossiphonia stagnalis (Linn). 
Glossiphonia fusca Castle. 
Variety lineata, 
Variety papillata. 
"Dina fervida (Verrill). 
Dina parva Moore. 
Dina macrostoma Moore. 
JErpohdella punctata Leidy. 
Nephelopsis obscura Verrill. 
Placobdella phalera (Graf). 
Cladocera 
Eurycercus lamellatus Muller. 
Simocephalus serrulatus Koch. 
Simocephalus vet ulus Muller. 
Daphnia retrocurva Forbes. 
Sida crystallina Muller. 
Diaphanosoma brachyurum (Lieven), 
Bryozoa 
Plumatella polymorpha Kraepelin. 
OSTRACODA 
Cypria species. Cypridopsis species. 
Amphipoda 
Eyalella TcnicTcerbocTceri Bate. Gammarus fasciatus Say. 
ISOPODA 
Asellus intermedius Forbes. 
Decapoda 
Cambarus propinquus Girard. 
