576 PROTOZOOLOGY 



Genus Myriospora Lermantoff. Anisogamy and sporogony in 

 marine snails; schizogony unknown; oocyst forms numerous spores 

 each with 2 sporozoites. One species. 



M. trophoniae L. In the polychaete, Trophonia plumosa; macro- 

 gametes, vermiform, up to 800ju long, later ovoid; microgameto- 

 cyte forms first about 100 cytomeres, each with some 20 nuclei; 

 microgametes comma-shaped; anisogamy; oocyst with several hun- 

 dred spores, each with about 24 sporozoites. 



Genus Hyaloklossia Labbe. Schizogony unknown; sporogony in 

 the kidney of marine mussels; oocyst in the organ-cavity; spherical 

 spores of 2 kinds: smaller one with 2 spirally coiled sporozoites and 

 the other with 4-6 sporozoites. One species. 



H. pelseneeri Leger. Spherical oocysts 75-SOfj. in diameter; spores 

 8/x and 11— 12^ in diameter; in kidney of Tellina sp. and Donax sp. 



Genus Angeiocystis Brasil. Schizogony unknown; sporogony in 

 polychaetes; oocyst forms 4 spores; spore oval, with about 30 

 sporozoites and residual body at a pole. One species. 



A. audouiniae B. In the cardiac body of Audouinia tentaculata; 

 macrogametes vermiform, up to 65/z long. 



Family 3 Dobelliidae Ikeda 



Numerous microgametes develop from each microgametocyte; 

 the union of gametocytes begins early. 



Genus Dobellia Ikeda. Schizonts sexually differentiated: micro- 

 schizonts and macroschizonts; young schizonts binucleate; associa- 

 tion of 2 gametocytes begins early as in Adeleidea (p. 590), but 

 many microgametes are formed in each microgametocyte. One 

 species (Ikeda, 1914). 



D. binucleata I. In the gut of Petalostoma minutum; mature oocyst 

 20-25ju in diameter, with a thin wall, contains some 100 sporozoites 

 without any spore membrane around them. 



Family 4 Eimeriidae Leger 

 Macro- and micro-gametocytes develop independently; micro- 

 gametocyte produces many gametes; an oocyst from a pair of 

 anisogametes ; oocyst with variable number of spores containing 

 1-many sporozoites, which condition is used as basis of generic 

 differentiation. Oocysts found in the faeces of hosts are usually im- 

 mature; time needed for completion of spore formation depends 

 upon the species, temperature, moisture, etc. Becker (1934) recom- 

 mends the following bactericidal solutions in which oocysts develop 

 to maturity: 1% formaldehyde, 1% chromic acid of 2-4% potas- 

 sium dichromate. 



