786 H. M. wooDr'ofK. 



38. Woodcock, H. M. — " On the Occurrence of Nuclear Dimorphism in 



a Halteridiuni Parasitic in the ChaflEinch, etc.," ' Quart. Joum. 

 Micr. Sci.,' 53, 1909. p. 339 (text-fi^'s.). 



39. " The Ha^motlagellates and Allied Foinis." in Lankester's 



' Treati.se on Zoology.' vol. i, '" Protozoa," fasc. i, p. 193. London : 

 A. and (J. Black. 1909. 



EXPLANATION OF PLATES 27—31, 



Illustrating Dr. H. M. Woodcock'.s paper " L On certain 

 Parasites of the Chaffinch (Fringilla cfjelebs) and 

 the Redpoll (Linota ruf escen.s).' 



>> 



[All the drawings on Pis. 1 — 4 are drawn to a uniform niac(nification of 

 2000 diameters. For several of the coloured figures on PI. 1 and for 

 two or three of the drawings on each of the other plates I am indeljted 

 to Miss Rhodes, who has kindly done them for me.] 



Plates 27 and 28. With the exception of figs. 7-13. 22. 23. o7, and 58, 

 all the figures relate to the parasites as found in the l>irds. 



PLATE 27. 



Figs. 1-6.— Trypanosoma fringillinarum , n. sp. 



Fig. 1. — Adult, ordinary individual from the blood of a chaffinch 

 inoculated from a redpoll-culture. 



Fiy-. 2. — Ditto, from the l>one-marrow of a naturally infected chaffinch. 



Fi"S. 3 and 4.— Slightly smaller forms : 3. from the Mood of a red- 

 poll ; 4. from the bone-marrow of a chaffinch. 



Figs. 5 and 6. — Small forms of the fusifonn type (case B), from the 

 bone-mari-ow of a chaffinch. 



Figs. 7-13. — Cultural forms of the trypanosome ; 7-12 from chaffinch 

 cultures ; 13 from a redpoll one. 



Figs. 7-9. and 13. — Trypanomonad forms (6 and 7 days). 



Fig. 10. — Early trypaniform type (40 hours). 



Figs. 11 and 12. — Examples of erjual and unequal binary fission. 



Figs. 14-18. — Halteridiiim fringillas (Labbe). 



Fig. 14. — Female individual. 



Figs. 15 and 17. — " Indifferent " individuals. 



Fig. 16. — Special form, free in the blood-plasma, with chromatic 



