126 The Ohio Journal of Science [Vol. XX, No. 4, 



LITERATURE CONSULTED. 



Blochmann, F. 1895. Die Mikroskopische Thierwelt des Siisswassers. Abtheil- 



ung 1: Protozoa. Hamburg. 

 Butschli, O. 1883-88. Die Protozoen. Bronn's Klassen und Ordnungen des 



Tierreichs. 

 Calkins, G. N. 1901. The Protozoa. New York. 

 Cash, J., and Hopkinson. 1905-09. The British freshwater Rhizopoda and 



Heliozoa. London. 3 Vols. 

 Conn, H. W. 1905. Protozoa of the fresh waters of Connecticut. State Geologi- 

 cal and Natural History Survey, Bull. 2. 

 Doflein, F. 1907. Amobenstudien, Archiv f. Protistenk., Suppl. I, p. 250. 

 Edmondson, C. H. 1906. The Protozoa of Iowa. Proc. Davenport Acad. Sci., 2. 

 1912. Protozoa of high mountain lakes in Colorado. Boulder Univ. 



Colo. Stud. 9, pp. 65-74. 

 Edmondson, C. H. and Kingman, R. H. 1911. Japanese freshwater Protozoa. 



Trans. Amer. Micros. Soc. Vol. XXXII, pp. 93-102. 

 Frenzel, J. 1892. tjber einige merkwiirdige Protozoen Argentiniens. Zs. wiss. 



ZooL, LIII, pp. 334-360. 

 Hausmann, L. A. 1917. Observations on the ecology of the Protozoa. Am. 



Nat., LI, pp. 157-172. 

 Kellicott, D. S. 1895. Observations on some freshwater Infusoria, with descrip- 

 tions of a few species regarded as new. Proc. Am. Soc. Micros. 1885-1888. 

 Kent, W. S. 1881. A manual of the Infusoria. London, 1881. 

 Landacre, F. L. 1908. The Protozoa of Sandusky Bay and Vicinity. Ohio 



Acad. Sci., IV, pp. 421-472. 

 Leidy, J. 1879. The freshwater Rhizopods of North America. U. S. Geol. 



Surv. of the Territories, XII. 

 Minchin, E. A. 1912. An introduction to the study of the Protozoa. London. 

 Pascher, A. and Lemmermann. 1913. Die Siisswasserflora Deutchlands, Oster- 



reichs und der Schweiz. Heft 2: Flagellate 2. Jena. 

 Penard, E. 1902. Faune Rhizopodique du Bassin du Leman. Geneve. 

 Plough, H. H. 1916. The genus Aspidisca Ehrenberg. Trans. Amer. Microsc. 



Soc, XXXV, pp. 233-245. 

 Stokes, A. C. 1888. A preliminary contribution toward a history of the fresh- 

 water Protozoa of the U. S. Journ. of the Trenton Nat. Hist. Soc, I. 



1895. Notices of some presumably undescribed Infusoria. Proc. Am. 



Phil. Soc. XXXIII, p. 338; Journ. Roy. Micr. Soc, p. 438. 

 Verworn, M. 1896. Die polare Erregung der lebendigen Substanz. Mittheilung 



4. Pfliiger's Archiv. f. d. ges. Physiol. Bd. 65. Referred to in Verworn's 

 ' AUgcmeine Physiologic, 3rd ed., pp. 193-194. 

 Wailes, G. H. and Penard, E. 1911. Clare Island Survey— Rhizopoda. Proc. 



Roy. Irish Acad., XXXI, part 65. 

 Sand, Rene. 1899-1900. Etude monographique sur le groupe des Infusoires 



tentaculiferes. Annales de la Societe Belg. de Microscopic. Brussels. 

 Walton, L. B. 1915. A review of the described species of the order Euglenoidina 



Bloch. Ohio Biol. vSurvey, Bull. 4. 



