Sporozoa 331 



121. • 1943. Bull. Wyoming Agr. Exp. Sta., No. 259. 



122. Shellack, C. 1907. Arch. f. Protlstenk. 9: 297. 



123. Smith, T. and F. H. Kilbourne 1893. Bull. Bur. Anim. Ind., U. S. Dept. Agr. 1: 177. 



124. Spindler, L. A. and H. E. Zimmerman 1945. J. Parasit. 31 (Suppl.): 13. 



125. Sprague, V. 1940. Trmis. Amer. Micr. Soc. 59: 460. 



126. 1941. ///. Biol. Monogr. 18, No. 2. 



127. and J. Ramsey 1942. /. Parasit. 28: 399. 



128. Stevenson, A. C. 1915. Quart. J. Micr. Sci. 61: 127. 



129. Swarczewsky, B. 1914. Arch. f. Protistenk. 33: 49. 



130. Thompson, P. E. and C. G. Huff 1944. J. Inf. Dis. 74: 48. 



131. and 1944. /. Inf. Dis. 74: 68. 



132. Tripathi, Y. R. 1948. Parasitol. 39: HO. 



133. Troisi, R. A. 1933. Trans. Amer. Micr. Soc. 52: 326. 



134. Tyzzer, E. E. 1912. Arch. f. Protistenk. 26: 394. 



135. 1929. Amer. J. Hyg. 10: 269. 



136. Warren, J. and A. B. Sabin 1942. Proc. Soc. Exp. Biol. Med. 51: H. 



137. Weissenberg, R. 1913. Arch. mikr. Anat. 82: 81. 



138. Wenyon, C. M. 1910. Parasitol. 3: 63. 



139. 1926. Protozoology (London: Ballicre, Tindall & Cox). 



140. Weschenfelder, R. 1938. Arch. f. Protistenk. 91: 1- 



141. Wolf, A., D. Cowen and B. Paige 1939. Science 89: 226. 



142. , and 1941, Science 93: 548. 



143. Wolfson, F. 1940. Amer. J. Hyg. 32 (C): 88. 



144. 1941. Amer. J. Trap. Med. 21: 653. 



