HAEMOSPORIDIA 



501 



Mathis and Leger (1910) described this species from the teal duck 

 (Querquedula crecca) in Tonkin, China. Wick ware (1915) saw L. 

 anatis in ducks in Canada. O'Roke (1934) carried on experimental 

 studies on the developmental cycle with the form which he found in 

 wild and domestic ducks in Michigan. Herman (1938) observed the 



Fig. 234. The life-cycle of Leucocytozoon simondi (Brumpt, modified), 

 a-c, development of macrogamete; d-f, development of microgametes; 

 g, fertilization; h, ookinete; i, j, ookinete piercing through the stomach 

 wall; k-m, development of sporozoites; n, sporozoites entering endo- 

 thelial cells; o-r, schizogony. 



organism in common black ducks {Anas ruhripes /mits) , red-breasted 

 merganser (Mergus serrator), and blue-winged teal (Querquedula 

 discors) and considered L. anatis as identical with L. simondi. Huff 

 (1942) also maintained the species he studied in mallard ducks {Anas 

 p. platyrhynchos) and domestic ducks from Wisconsin to be L. sim- 

 ondi. 



