f4. H. F. Nuttall and C. Strickland 
71 
(3) Very large single parasites, of which a certain number are to be 
found, may show very little change of form, although they be watched 
for hours. They may remain rounded for long periods of time or 
assume an elongate^ or plump piriform shape which is usually more or 
less transitory. 
Diagram V. N. equi. Illustrating more especially the mode of multiplication of N. equi 
as observed in several infected corpuscles. 
Fig. A. A single parasite observed through successive stages to the formation of four free 
oat-shaped or piriform parasites (Horse III, 13. viii. 10, blood at 41° C., G. H.P. N. 
del.). 
Fig. B. A “cross-form” which gradually gives rise to five parasites which move about 
inside the corpuscle (Horse I, 7. xii. 09, 39° C., H. B. F. del.). 
Fig. C. The later stages in the development of a single parasite into six parasites 
(Horse I, 6. xn. 09, 38° C., C.S. del.). 
Fig. D. A “cross-form,” of which the component elements separate and swim about 
actively in the corpuscle prior to escaping without injiu’ing the corpuscle (Horse III, 
13. VIII. 10, 35°C., G.H.F.N. del.). 
Fig. E. Whereas in the preceding instances the mother cell divides directly into 4-5-6 
daughter cells of equal size, we have in this case what would appear to represent a 
budding-off process of small daughter cells which are liberated successively (Horse HI, 
12. VIII. 10, 37° C., G.H.F.N. del.). In Fig. F apparently a similar process is taking 
place (Horse II, 17. xii. 09, 37° C., H.B. F. del.). 
' Such parasites may extend across the whole width of the corpuscles. The latter, in 
the horse, average 5‘6/i in diameter. 
