470 The Protogoa of Sandusky Bay and Vicinity. 
Vorce, C. M. 
1881. Forms observed in Water of Lake Erie. 
Proc. of Amer. Soc. of Mic., Aug. 1881, pp. 51-64. 
1882. Microscopic Forms observed in Water of Lake Erie. 
Proc. of Amer. Soc. of Mic., Aug. 1882, pp. 187-197. 
Walker, James. 
1897. A Strange and Undetermined Form of Pond-life 
from Brooklyn, N. Y. 
Journ. N. Y. Micr. Soc., Vol. 13, No. 3, pp. 75-6. 
Walton, L. B. 
1905. Actinolophus minutus. A new Heliozoan with a re- 
view of the species enumerated in the genus. 
The Ohio Naturalist, Vol. V, No. 3, Jan., 1905. 
Whipple, G. C. 
1894. Synura, Injurious to Drinking Water. 
The Amer. Mic. Jour., Vol. XV, Sept. 1894, No. 9. 
1897. Biological Studies in Massachusetts, III. Geograph- 
ical Distribution of Microscopical Organisms. 
Am. Nat., Vol. 31, pp. 1016-26, No. 372. 
Whipple, G. C. and Parker, Hor. N. 
1899. Note on the Vertical Distribution of Mallomonas. 
Am. Nat., Vol. 33, pp. 485-491. 
Whipple, G. C. 
1900. Chlamydomonas and its Effect on Water-supplies. 
Trans. Am. Micr. Soc., Vol. 21, pp. 97-102, pl. I. 
Wilson, H. V. 
1900. Notes on a Species of Pelomyxa. 
Am. Nat., Vol. 34, pp. 535-550, figs. 11 
Wright, R. Ramsey. 
1880. Trichodina pediculus, parasitic on the gills of Nec- 
turus. 
Am. Nat., Vol. 14, 1880, pp. 133. 
