A. C. Coles 
59 
PiXELL, Helen L. M. (1913). Xotes on Toxoplasma gondii. Proc. Roy. Soc. Ser. B, 
Lxxxvii. No. B, 592. 
Porter, Annie (1908). Leucocytozoon rnvsctdi sp. n. A parasitic Protozoon from 
the blood ofWliite Mice. Pmc. Zool. Soc. 1908, 703-16 with 1 pi. 
VON Prowazek (1912). Randhv,ch der Pathogenen Protozoen. Leipzig, 565. 
DESCRIPTION OF PLATES ll-V. 
PHOTOMICROGRAPHS. = precisely 1000 diameters unless otherwise 
stated. 
PLATE II. 
Fig. 1. Fusiform trypanosome of Blackbird. 
Fig. ‘2. Piriform trypanosome of Blackbird. 
Fig. 3. Small trypanosome of Thrush. 
Fig. 4. Large trypanosome of Thrush. 
Fig. 5. Trypanosome of the Jay. 
Fig. 6. Tr 3 'panosome of the Mole. Note variations in size of the three which are of 
precisely the same magnification. 
Fig. 7. Tw'o trypanosomes of the Eat. 
Fig. 8. Two trypanosomes of the Pipistrelle. 
Fig. 9. Immature stages of the trypanosome of the Pipistrelle, x 1500. One is pear- 
shaped and has two flagella proceeding from the centrosome. The other has two 
nuclei, two centrosomes and a pair of flagella to each centrosome. 
Fig. 10. Immature stages of trypanosomes of the Pipistrelle, each has a single flagellum. 
Fig. 11. Immature stages of trypanosomes of the Pipistrelle, one with two flagella, and 
a dividing one with four flagella. 
Figs. 12 & 13. Pneumocysts from lung of Rat. No. 12 x 2000. No. 13 x 1500. 
Fig. 14. Three haemogregarines from the Field Mouse. The third one is shedding 
granules, the middle one shows, unfortunately indistinctly, longitudinal divisions of 
the nucleus by myonemes. 
Fig. 15. Multiplication cyst, somewdiat degenerated, of the haemogregarine of the Field 
Vole. 
Fig. 16. Haemogregarines (free) from the Eat. 
Fig. 17. Haemogregarines (5) from the Field Vole. The top left is closely applied to 
the nucleus, the middle one is lying between the lobes of the nucleus and one free 
form is seen. 
Fig. 18. Pigmented intracorpuscular parasites. Haemamoeba, of the Pipistrelle, showing 
various stages in growth, x 1500. 
Fig. 19. Piroplasma-like intracorpuscular parasites (named provisionally Nuttallia microti 
sp. n. ?) from the Water Vole. xl500. The three in the middle row show division 
in cross form into four very small pear-shaped parasites. Note that all the parasites 
are somewhat marginal in position, one is almost outside the red cell. See also 
fig. 45. 
Fig. 20. Piroplasma-like intracorpuscular parasites (named provisionally Nuttallia 
muris sp. n.?) from the Field Mouse, x 1500. Top right shows amoeboid changes; 
middle left and lower right a line passing across the centre, and the middle right a 
comma or pear-shaped parasite. 
