434 



SPECIFIC MICRO-ORGANISMS 



known as the ookinete. Further development 

 has not been observed, but there can be little 

 doubt that the further stages of sporogony and 

 also the unobserved stages of schizogony in the 

 bird are somewhat analogous to those of H. 

 columbcR or to those of the plasmodia of human 

 malaria. Whether the halteridia which occur in 

 various species of birds are all of one species cannot 

 be decided without further investigations. 



Haemoproteus (Leukocytozobn) Ziemaimi.— 

 This organism was doubtless seen by Danilewsky 

 in 1890.1 Ziemann in 1898 described it as a 

 parasite in the blood of hawks. Its known life 

 Hamotroteus history is Very incomplete, and even the nature 



(Leukocylozoon) ■' •' .... , ''^j, 



ziemanni. Macro- of the blood Cell cont^mmg it IS somcwhat 

 ESocy"t doubtful. The youngest stage observed in the 

 (paler.) (Frofn blood is a Small oval parasite^ situated at the side 



Dojlein after r i i i i n mi i ii 



Schaudinn.) of the nucleus of the blood cell. T. he latter appears 



Fig. 192. 



A B 



Fig. 193. — H cemoproteus (Leukocytozoon) ziemanni. A, Formation of ^micro- 

 gametes from the microgametocyte; B, Fertilization of the macrogamete by one of 

 the microgametes swarming about it. {From Doflein after Schaudinn.) 



' CenlraM. f. Bakt., 1891, Bd. IX, S. 401, Fig. i. 



2 The description here given is derived in part from unpublished observations 

 by Novy and MacNeal. See Proc. Soc. Exp. Biol, and Med., 1904-05, Vol. II, 

 pp. 23-28; American Medicine, 1904, Vol. VIII, pp. 932-934. 



