1908.] BLOOD-PARASITE OF WHITK MICE. 715 



[7] Cleland, J. B. 1906.— "The Haemogregarine of Majnmals 



{H. halfouri), and some notes on Eats." Journ. Trop. 



Med., vol. ix. p. 296. 

 [8] Danilewskt, 1890. — "La developpement des parasites 



malariques dans les leucocytes des Oiseanx (Leuco- 



cytozoaires).'"' Ann. Inst. Pasteur, 1890, p. 427. 

 [9] Gerrard, p. N. 1906. — " On a Protozoon Parasite found in 



the Polymorphonuclear Leucocytes of a Dog." Journ. 



Hygiene, vi. pp. 229-230. 

 [10] James, S. P. 1905. — " On a Parasite found in the white 



corpuscles of the Blood of Dogs." Sci. Mem. Govt. India, 



No. 14. 

 [11] Patton, W. S. 1906.— "On a Parasite found in the white 



corpuscles of the Blood of Palm Squirrels." Sci. Mem. 



Govt. India, Ko. 24. 

 [12] ScHAUDiNN, F. 1904. — " Generations- und Wirtswechsel bei 



Trypanosome und Spirochsete." Arb. a. d. Kaiserlichen 



Gesundheitsamte, xx. p. 387. 

 [13] Seligmann, 0. G., and Sambon, L. W. 1907. — " Preliminary 



Note on a Leucocytozoon found in the blood of Red Grouse 



{Lagopus scoticus)." Lancet, Sept. 21, 1907, p. 829. 

 [14] Wenyon, C. M. 1906.— "Report on Dr. P. N. Gerrard's 



preparations . . . . " Journ, Hygiene, vi. pp. 231-236^ 



1 plate. 



XII. EXPLANATION OF PLATE XXXIX. 



The figures on the Plate XXXIX. were outlined with camera lucida (Abbe), 

 using Zeiss y^ i^^h achromatic and 2 mm. apochromatic oil-immersion objectives 

 with compensating oculars 4 and 8. Zeiss E objective was also used for fresh 

 preparations. 



Fig. 1. Shows a free trophozoite which is broad and short. Stained Giemsa. 



X 1700. Liver smear of 1st mouse. 

 Fig. 2. Free trophozoite, rather large. Shows one chromosome. Giemsa. X 1700. 



Liver smear of 2nd mouse. 

 Fig. 3. Smaller, possibly younger, form. It has one patch of chromatin. Giemsa. 



X 1700. Liver smear of 1st mouse. 

 Fig. 4. Form showing dotted nucleus, also dors along the nuclear membrane. 



Giemsa. X 1700. Heart smear of 1st mouse. 

 Fig. 5. Parasite showing central chromatin filaments. The Leucocytozoon is not so 



markedly granular as some. Giemsa. X 1700. Liver smear of 1st mouse. 

 Fig. 6. Cf. fig. 1. The nucleus is vesiculai' and chromatin is distributed round the 



nuclear membrane. Giemsa. X 1700. Liver smear of 2nd mouse. 

 Fig. 7. Shows pale, vesicular nucleus, also myonemes (mi/) are well seen. The ends 



are somewhat pointed. Giemsa. X 2250. Liver smear of 2nd mouse. 

 Fig. 8. Parasite in a clear cytocyst (ci/). It has a patch of extra-nuclear chromatin 



in the endoplasm. Giemsa. X 1700. Liver smear of 1st mouse. 

 Fig. 9. Parasite in cytocyst. Caps of chromatin present. Giemsa. X 1700. Kidney 



smear of 1st mouse. 

 Pig. 10. Parasite in cytocj'st with deeper staining nucleus; also very granular 



protoplasm. Giemsa. X 1700. Liver smear of 1st mouse. 

 Fig. 11. Shows pale-staining vesicular nucleus and definite myonemes {mi/). In 



C3'toc}'st {cy). Giemsa. X 1700. Liver smear of 1st mouse. 

 Fig. 12. Broad parasite within cytocyst (ci/), showing alveolar protoplasm. Giemsa. 



X 1700. Spleen smear of 1st mouse. 

 Fig. 13. Free forms in plasma. Methj'lene-blue. Peripheral blood of 3rd mouse. 

 Fig. 14. Free vermicule penetrating mononuclear leucocyte. Methylene-blur. 



X 1200. Peripheral blood of 3rd mouse. 



