SPOROZOA, GREGARINIDA 567 



Goodrich, E. S. and Goodrich, Helen L. M. P.: (1920) Gonospora 



minchini, n. sp., etc. Quart. J. Micr. Sc, 65: 157. 

 Goodrich, Helen P.: (1925) Observations on the gregarines of 



Chiridota. Ibid., 69:619. 



(1938) Nina: a remarkable gregarine. Ibid., 81:107. 



(1949) Heliospora n.g. and Rotundula n.g., etc. Ibid., 90: 



27. 



- (1950) Sporozoa of Sipunculus. Ibid., 91:469. 

 Grell, K. G.: (1938) Untersuchungen an Schizogregarinen. I. Arch. 



Protist., 91: 526. 

 Hatt, P.: (1931) L'evolution des porosporides chez les mollusques. 



Arch. zool. exper. gen., 72:341. 

 Hesse, E.: (1909) Contribution a l'etude des monocystidees des 



Oligochaetes. Ibid., 3:27. 

 Jameson, A. P.: (1920) The chromosome cycle of gregarines, with 



special reference to Diplocystis schneideri. Quart. J. Micr. Sc, 



64:207. 

 Jones, A. W. : (1943) Metamera reynoldsi n. sp., etc. Tr. Am. Micr. 



Soc. 62:254. 

 Kamm, Minnie W.: (1920) The development of gregarines and their 



relation to the host tissues. III. J. Parasit., 7:23. 



(1922) Studies on gregarines. II. Illinois Biol. Monogr., 7:1. 



(1922a) A list of the new gregarines described from 1911 to 



1920. Tr. Am. Micr. Soc, 41:122. 

 Keilin, D.: (1920) On two new gregarines, etc. Parasitology, 12: 



154. 

 Landau, Helen and Galtsoff, P. S.: (1951) Distribution of Nema- 



topsis infection on the oyster grounds of the Chesapeake Bay 



and in other waters of the Atlantic and Gulf states. Texas J. Sc, 



3:115. 

 Leger, L.: (1892) Recherches sur les gregarines. Tabl. zool., 3:1. 

 (1893) Sur une gregarine nouvelle des acridiens d'Algerie. 



C. R. Acad. Sc, 117:811. 

 (1906) Etude sur Tacniocystis mira Leger, etc. Arch. Pro- 

 tist., 7:307. 



(1907) Les schizogregarines des tracheites. I. Ibid., 8: 159. 



(1909) II. Ibid., 18:83. 



and Duboscq, O.: (1915) Etudes sur Spirocyslis nidula, etc 



Ibid., 35:199. 



(1925) Les porosporidies et leur evolution. Trav. St. 



zool. Wimereux, 9:126. 

 Leidy, J.: (1853) On the organization of the genus Gregarina of Du- 



four. Tr. Am. Philos. Soc, n.s., 10:233. 

 Mackinnon, Doris L. and Ray, H. N.: (1931) Observations on 



dicystid gregarines from marine worms. Quart. J. Micr. Sc, 



74:439. 

 (1933) The life cycle of two species of "Selenidium" 



from the polychaete worm Potamilla reniformis. Parasitology, 



25:143. 

 Martiis, L. Cognetti de: (1911) Contributo alia conoscenza delle 



