58 BULLETIN OF THE LABORATORIES 



ORDER I, RHIZOTA. 

 Family FLOSCULARIDAE. 



I Genus Floscularia, Oken. 

 Sp. 1. Floscularia ornata, Ehrenberg. 



Floscularia ornata, Hudson and Gosse. The Rotifera. or Wheel-animalcules, 



Vol. I, p. 50; pi. I, fig. 9. 

 Floscularia ornata, C. L. Herrick. Bull, of Sci. Lab. of Denison Univ., 



Vol. I, p. .47. 



This species is not very abundant in this locality. It is occasion- 

 ally found attached to the roots of the duck weed (Lcmnacea polyrrhi- 

 za, L. ) 



ORDER II. BDELLOIDA. 



Family PHILODINADAE. 



II Genus Philodina, Ehrenberg. 



Sp. 2. Philodina roseola, Ehrenberg. 



Philodina roseola, Hudson and Gosse, The Rotifera, or Wheel-animalcules, 

 Vol. I, p. 99; pi. IX, fig. 4. 



This species is abundant in all of our pools that contain water 

 plants. Occasionally it adopts unique habitations. I have often 

 found one or more of them inhabiting the cast off shells of some 

 cladocera. 



Sp. 3. Philodina megalotrocha, Ehrenberg. 



Philodina negalotrocha, Hudson & Gosse, The Rotifera > 



or Wheel-animalcules, Vol. I, p. 1 ji; pi. IX, fig. 7. 



This species appear to be quite rare. I have encountered it but 

 once. Then it was found among a mass ot filamentous algae which 

 had been gathered from a shallow meadow pool. There it was quite 

 abundant. 



III. Genus Rotifer, Schrank. 

 Sp- 4. Rotifer vulgaris, Shrank. 



Rotifer vulgaris, Hudson and Gosse, The Rotifera, or 



Wheel-animalcules, Vol. I, p. 104; pi. X, fig. 2. 



This species inhabits a few of our stagnant ponds. It is found in 

 company with Cyclops viridis, J urine, naiad worms and other filth-lov- 

 ing creatures. 



