4 BULLETIN OF THE LABORATORIES 



Additional locality : In a shallow, sluggish, grassy creek ; Lock- 

 land, O. September, 1892. 



Genus Simocephalus, Schodler, 1858. 



Simocephaltis vettilus, O. ¥ . Miiller. 



Simocephahis vetuhts, . . . E. A. Birge. Notes on Clad., 1878, 



p. 8. 



Additional locality : In a shallow, sluggish, grassy creek ; 

 Lockland, O. September, 1892. 



Genus Daphnia, Schodler. 



Daphnia pulex, O. F. Miiller. 



Daphnia pule X, . . . E. A. Birge. Notes on Clad., 1878, pp. ii- 

 12 ; pi. I, fig. II. 



Additional locality : During high water in the spring of 1892, 

 myriads of this species were found in a large creek (Mill Creek). It 

 is very probable that these were washed into the creek, by the flooding 

 of the ponds near its banks. 



Normally at this place the ephippal females of this species are 

 formed about the middle of September. But last June numerous 

 ephippal females were collected from small pools that were rapidly 

 drying up. 



Family BOSMINIDAE. 



Genus Bosmina, Baird, 1850. 



Bosmina cormita, Jurine. 



Bosmina cormita, . . . E. A. Birge. Notes on Cladocere, 1878, 

 p. 15, pi. II, fig, 10. 



This species seems to be rare. I have only encountered it once, 

 when I found several in a shallow, grassy pool at Tusculum, Ohio. 

 Length, 0.256 mm. 



Family LYNCEIDAE. 



Sub-family LYNCEINAE. 

 Genus Camptocercus, Baird, 1851. 



Caviptocercus niacrurus, O. F. Miiller. 



Camptocercus macriirtis, . . . E. A. Birge. Notes on Cladocera, 



1878, p. ZZ. 

 Camptocercus macrurus, . . . C. L. Herrick. Final Report on 



Minn. Crust., 1884, p. ?>t„ pi. E, fig. 10. 



The specimen here identified as a member of this species is 

 smaller than the specimens found by Prof. Birge in Massachusetts and 



