

THE MICROSCOPE. 



Vol. V. 



ANN ARBOR, MAY, 1885. 



No. 5. 



ORIGINAL COMMUNICATIONS. 



A KEY TO THE VORTICELL^E. 



DR. ALFRED C. STOKES, TRENTON, N. J. 



THE following scheme for the rapid identification of unrecog- 

 nized or imperfectly remembered forms of this extensive 

 generic group has proved so convenient that it is here pub- 

 lished, in the hope that it may be as useful to the readers of 

 The Microscope as it has been to the writer. Information in 

 respect to errors or omissions will be received gladly. 



Different Parts of a Vortieella. 



C. Ciliary disc. 

 P. Peristome. 



S. Sti'iated body. 



M. Muscular thread surrounded by 



s, sheath, both forming the 



pedicle. 



1. Conical, v. macrophya. 



2. Elougate, v.utriculus. 



3. Ovate, v. striata. 



4. Subcylindrical, v. quadrangularis, S. K. 



5. Broadly campanulate, v. Lockwoodii. 



6. Conical-campanulate, v. chlorostigma, 



Ehr. 



7. Spheroidal, v. globularis, Mull. 



With an amplification of 350 diameters or less. 



