184 
E. A. MINCH IN AND H. M. WOODCOCK. 
[All the figures relate to Trypanosoma noctuae, and are magni- 
fied 2000 times linear. We are indebted to Miss Rhodes for kindly 
drawing and colouring most of the figures on PI. 20, and for drawing 
two or three of those on PI. 21.] 
PLATE 20. 
Figs. 1-11 are from owl 8 ; figs. 12 and 13 from owl 23. 
(All the figures are from preparations stained by Giemsa.) 
Figs. 1-3. — Small forms (small spindles). 
Fig. 4. — Transitional form from small fusiform type to slender, 
medium-sized type. 
Figs. 5 and 6. — Young individuals of the slender, medium-sized type 
(not Lilly developed). 
Figs. 7 and 8. — Fully developed individuals of the medium-sized 
form ; the individual of fig. 7 is probably a little flattened. 
Fig. 9. — Small individual of the massive “ blue ” type (c f. with figs. 5 
and 6). 
Figs. 10 and 11. — Large individuals of the massive “ blue ” type ; the 
latter shows indications of the longitudinal bands in the cytoplasm. 
Figs. 12 and 13. — Stout spindles (early summer phase) ; the former is 
£ typical, full-sized individual ; the latter is flattened out (so-called leaf 
form). 
PLATE 21. 
Figs. 14-17, 19 and 20, 22-24, 32-36, 38, 39 and 44 are from owl 8 ; 
figs. 18, 21, 37 and 43 from owl 13 ; figs. 25 and 26 from owl 19 ; and 
figs. 27-31, 40-42 from owl 23. 
(Figs. 14-31 are from preparations stained by Giemsa.) 
Figs. 14 and 15. — Small spindles. 
Fig. 16. — Small spindle, just commencing division; there are two 
kinetonuclei, and apparently the karyosome in the trophonucleus has 
also divided. 
Figs. 17-19. — Intermediate stages in the growth of the medium-sized 
slender type. 
Figs. 20 and 21. — Fully developed medium-sized forms. 
Figs. 22 and 24. — Massive “ blue ” forms. 
Fig. 23. — Small individual of the same type. 
Figs. 25, 26, and 28. — Stout spindles. 
Fig. 27. — Transitional form from small fusiform type to stout 
spindle. 
