172 
IOWA ACADEMY OF SCIENCES. 
The species found are as follows: 
-Family Sididae. 
Family Daphniidae 
Sid a crystallina O. F. M. 
Dapbnella bracbyura Liev. 
Simocepbalus vetulus O. F. M. 
Simocepbalus serrulatus Koch. 
Ceriodapbnia reticulata Jur. 
Ceriodapbnia consors Birge. 
Ceriodapbnia lacustris Birge. 
Scapboleberis wucronata O. F. M. 
Scapboleberis obtusa Schdl. 
Dapbnia byalina Leydig. 
Dapbnia kalbergensis Schoedler. 
Dapbnia kal. var., retrocurva Forbes 
Dapbnia sp? 
Macrotbrix laticornis Jur. 
Iliocryptus sordidus Lieven. 
f Eurycercus lamellatus O. F. M. 
Alona sp? 
Dunbevedia setiger Birge. 
Pleuroxus denticulatus Birge. 
Pleuroxus procurvatus Birge. 
Cbydorus spbaericus O. F. M. 
Cbydorus globosus Baird. 
Leydigia quadrangularis Leyd. 
Camptocercus rectirostris Schdl. 
Family Leptodoridae Leptodora byalina Lillj. 
The distribution of the species is given in the table: 
Dapbnella bracbyura. 
Family Macrotbricidae 
Family Lynceidae 
West Okoboji, open lake, from 
six to eight feet below surface. . 
West Okoboji, among weeds near 
shore 
Streams near Newell, Iowa ^ 
Dapbnia kalbergensis. 
Dapbnia kal . , variety retrocurva. 
Dapbnia byalina. 
Ceriodapbnia lacustris. 
Cbydorus spbaericus. 
Cbydorus globosus. 
Leptodora byalina. 
Sida crystallina. 
Ceriodapbnia consors. 
Simocepbalus serrulatus. 
j Cbydorus sp? 
I Pleuroxus denticulatus. 
I Pleuroxus procurvatus. 
f Ceriodapbnia reticulata. 
Simocepbalus serrulatus. 
Simocepbalus vetulus. 
Scapboleberis mucronata. 
I Pleuroxus denticulatus. 
I Cbydorus spbaericus. 
