440 BIOLOGY OF THE PROTOZOA 



(b) Eimeria s. str. (Eimeria, A. Sclin.). Membrane of sporocyst 



formed after fertilization, sporoblasts spherical or oval with a 

 micropyle, opening only in gut of new host. E. falciformis, 

 Eimer (1870) parasite of the mouse, E. stiedce, Lindemann 

 (1865), parasite of the rabbit and occasionally of man, cause of 

 acute diarrhea in cattle. 



(c) Eimeria (Orthospora, A. Schn., 1881), salamandrce (Steinhaus), 



propria (A. Schn.) from different species of Triton, and ranarum 

 from the frog. The macrogamete forms the future sporocyst 

 membrane before fertilization, "pyramid stage" absent, sporo- 

 blasts spherical or oval opening only in the new host. 



{d) Eimeria (Paracocciddum, Laver. and Mesnil, 1902). Membrane of 

 sporocyst formed after fertilization, pyramid stage absent, 

 sporoblast capsules formed but soon dissolved leaving sporo- 

 zoites free in the sporocyst. E. prevoti, Lav. and Mes., in gut 

 of frog. 



(e) Eimeria {Crystallospora, Labbe). Sporoblasts crystalline in form 

 of a double pyramid. E. cry stallo ides, Thelohan, 1893. Parasite 

 of the intestine of different species of Motella. 



In this genus also are probably to be included Eimeria avium 

 Silvestrini and Rivolta, the cause of destructive epidemics of 

 poultry, E. truncata Railliet and Lucet (1891) of geese, sporogony 

 alone is known, E. pfeifferi, Labbe (1896), parasite of pigeons, 

 E. faurei, Moussu and Marotel (1902), of sheep, E. miiraria, 

 Lav. and Mes (1902), parasite of Damonia reeved. 



Sub-family 6. Barrouxinae, Leger (1911) Fig. 184, A, b, c. The zygotes 

 in this group form many sporoblasts each containing one sporozoite. Sev- 

 eral genera have been described but we follow Mesnil and Doflein in regard- 

 ing them as sub-genera. 

 7. Genus Barrouxia, Schn. Types of the different sub-genera are given 

 below with the sub-genus name in brackets, 

 (a) Barrouxia {Diaspora, Leger). Sporoblast oval with micropyle. 

 (6) Barrouxia {Barrouxia, Schn. s. str.). Sporoblast lenticular, 



bivalved, and smooth, digestive tract of myriapods. 

 {c) Barrouxia {Echinospora, Leger). Sporoblast oval, bivalved and 

 spinous. 



(d) Barrouxia {Urobarrouxia, Mesnil). Sporoblast bivalved with tail- 



like appendage at each pole. 

 Sub-family 7. Caryotrophinse, Leger (1911). These are coccidia with 

 a rather complicated asexual cycle involving the formation of many aga- 

 mete-forming centers termed "agametoblasts." Pseudoconjugation un- 

 known, microgamete-forming centers are derived in the same manner as 

 the "agametoblasts," many sporoblasts are formed, each with many sporo- 

 zoites, sporoblasts with micropyles. 

 8: Genus Caryotropha, Siedlecki (1902). Parasite of the body cavity of 

 the marine annelid Polymnia nebulosa. Frequently groups of indi- 

 viduals are present in a cell, these are either agametoblasts each of 

 which would form a group of agametes, or they are microgameto- 

 cytes each of which would form a bundle of microgametes. The 

 zygote produces about twenty globular sporoblasts each with about 

 twelve sporozoites. 

 9. Genus Klossiella, Smith and Johnson (1902). Parasite of the mouse 

 kidney, forms found in a glomerulus were interpreted as asexual 

 stages, while those found in the cells of the tubules were regarded 

 as sexual. The full life history is not yet known. 



