THE GENUS KLOSSIA 



765 



and in the mitral valve of a patient who had died of anasarca. Coccidia have also 

 been found in the kidneys (Lindermann) ; in the skin (Milian, Cornil and Duret) ; 

 and in the liver (Gubler, Virchow, etc.). 



\Z 

 FIG. 368. Life history of a Coccidium. (Scheme after Schaudinn.) 



A. Schizogony. 1. A sporozoiite free in the intestine of the host. 2. Penetra- 

 tion into an epithelial cell. 3, 4. Growth of sporozoite into trophozolte. 5, 6, 7. 

 Stages in asexual multiplication. 8. Free merozoftes. 



B. Sporogony. 9a. Undifferentiated female cell. lOa. Macrogametocyte. 

 13a. Macrqgamete. A single macrogamete only is formed from each female cell. 

 9b. Undifferentiated male cell. lOb. Microgametocyte. 11, 12. Formation of 

 several microgametes from a single male cell. 13b. Microgamete. 14. Fer- 

 tilization. 15, 16, 17. Zygote. 18, 19. Formation of spores. 20. Formation 

 of sporozoites within the spores. 21. Sporozoltes released in intestine of host 

 (From Mense's " Handbuch der Tropenkrankheiten.") 



SECTION II. THE GENUS KLOSSIA. 



Klossia Jielicina is an excellent species for the study of the Coccidia and for 

 this reason a short description of it is given here. The parasite lives and is 

 almost always to be found in the tissues of Helix hortensis. Its life history 

 has been described by Laveran. 



Salomonsen recommends the following technique for the study of Klossia 

 Jielicina : 



Break the shell of an Helix Jiortensis as far as the second spiral near the 

 orifice. On removing the shell debris, a part of the lung and the pericardium, 

 through which the heart can be seen beating, will be exposed : and lying 

 by the side of these structures the kidney, appearing as a fusiform greyish 

 mass, will be seen. Take hold of the kidney with the forceps, cut off a small 

 piece with scissors, lay it on a slide and cover with a cover-glass. 



