STUDIES ON PARASITIC PROTOZOA. 
307 
Janicki, C.'— “ Unfcersucliungen an parasitisclien Flagellaten. I Teil. 
Lophomonas Ulattarum, Stein; L. striatns Biitschli,” 
‘ Zeitsclir. f. wissenschaft. Zool.,’ pp. 243-315 (1910) ; 4 pis. and 
16 text-figs. 
Kent, S.— ‘ A Manual of the Infusoria,’ London, 1880-82. 
Knnstler, J. — “ Snr cinq protozoaires parasites nonveanx,” ‘ C.R. 
Acad. Sci.,’ xcv, p. 347 (1882). 
Mackinnon, D. L. — “ Protists parasitic in the Larva of the Crane-flj, 
Tipnla sp.” (Preliminary Note), ‘Parasitology,’ vol. v. No. 3,' 
pp. 175-89, 27 text-figs. (1912). 
EXPLANATION OP PLATE 18, 
Illustratiug Miss Doris L. Mackinnon’s paper, Studies on 
Parasitic Protozoa. — I. The Flagellate Polymastix 
and its Affinities with the Trichonyniphida.^’ 
[All figures drawn to scale ( X 4000 approx.) under Zeiss comp. oc. 12 
and 2 mm. aj)ochromat. The stain employed was in all cases Heiden- 
hain’s iron-hsematoxylin after fixation with sublimate-alcohol.] 
Fig. 1. — Polymastix from Tipnla, showing dividing karyosome. 
Fig. 2. — A later stage in the division process : the daughter-karyo- 
somes have separated. 
Fig. 3. — Separation of the nuclei. 
Fig. 4. — One nucleus remains at anterior end ; the other migrates. 
Note that the basal granules have divided, and one of the missing 
flagella has been re-grown in each case. 
Fig. 5. — A slightly later stage. The body of the flagella shows signs 
of elongating. 
Figs. 6 and 7. — The wandering nucleus has reached the posterior end 
of the body. In fig. 7 the elongated body is beginning to constrict in 
the middle. 
Fig. 8. — The migrating nucleus has moved olf without being accom- 
panied by flagella. Note persistent axostyle. 
‘ Fuller references to the literature on Triclionymphid may be got 
by consulting the bibliography at the end of this work. 
