272 GEOL. AND NAT. HIST. SUHVEY OF MINNESOTA. 



GENUS SCAPHOLEBERIS Schoedler. 



Scapholeberis mucronata Miiller. 



Scapholeieris mucronata — C. L. Herrick, Final Report Minn. Crust., p. 42; PI. J, Fig. 5. 



Habitat: Atlanta. Georgia; Cincinnati, Ohio; Lockland, Ohio. 

 Abundant in shallow grassy ponds and sluggish creeks. 



GENUS SIMOCEPHALUS Schoedler. 

 Siniocephalus vetulus Miiller. 

 SimocepJiahis veiuhis — C. L. Herrick, Final Report Minn. Crust., p. 46. 

 Habitat: Cincinnati, Ohio; Kent county, Delaware. 



Siniocephalus serrulatiis Koch. 

 Simocephalus americanus — E. A. Birge. Notes on Clad., pp. 6-8; PI. I, Fig. 6. 



Length 1.7 mm. to 1.9 mm.; height 1.43 mm. This species is 

 often covered with vorticellid?e. Habitat: Atlanta, Georgia; Baxley, 

 Georgia; Cincinnati, Ohio; Kent county, Delaware. 



GENUS DAPHNIA Schoedler. 



Daphnia pulex Miiller. 



Dapnnia pulex — C. L. Herrick, Final Report Minn. Crust,, p. 56. 



Habitat: Cincinnati, Ohio; Covington, Kentucky. This species is 

 fond of foul water and is often associated with Moina paradoxa. 



Daplinia longireiiiiis Sars. (?) 



Daphnia longiremus Sars — C. L. Herrick, Final Report Minn. Crust., p. 63. 



Length 1.70 mm. This is a non-crested, hyaline specimen, marked 

 with rectangular meshes and devoid of pigment fleck. It resembles 

 the species under which I have placed it in all respects excepting 

 siez. I do not consider this alone sufficient to establish a new species. 

 It may, however, be a variety of the above. 



FAMILY BOSMINIDiE. 



GENUS BOSMINA Baird. 



Bosniiua cornuta Jurine. 



Bosmina cornuta — E. A. Birge, Notes on Clad., p. 15; PI. II, Fig. 10. 



Length 0.26 mm. Habitat: Tusculum, Ohio. Eare. Found^ in 

 grassy pools. 



