PL A TE XI. 



EXPLANATION. 



Figs. 1-19, Illustrating Deposit and Development of Infusorial Germs on 

 Hay-fibre, as described at Chapter IV. page 136 et scq. 

 Fig. 



1. Fragment of hay-fibre examined after six hours' maceration, showing zX a a 



encysted Vorticella, and sX b b b masses of microspores of Hctcromita lens, 

 X 800. 



2. Fragment of hay-fibre, wetted and immediately examined ; at a a a, microspores 



of Heteromita lens ; at b,^ four macrospores of Otkomonas fniitabilis; at c, 

 macrospores of Heteronema caudataj and at d, macrospores of an unde- 

 termined type, X Soo. 



3. Fragment of hay-fibre, showing at <z a mass of microspores of Heteromita lens 



lodged in crevice formed by the serration of its surface, X Soo. 



4. Fragment of hay-fibre encrusted with spore-masses of the single type Heteronita 



lens. 



5. Fragment of hay-fibre examined after two weeks' maceration, showing bacterial 



film and monad spores depending in grape-like clusters from its lower surface. 

 Minute monads developed from these spores, mixed with vibrios and Bacteria, 

 swimming beneath, x Soo. 

 6-17. Heteromita lens, Mull. sp. — 6, 7, Two isolated p.itches of microspores, x 800 ; 

 8, 9, free-swimming monadiform germs developed from the patches of 

 microspores, X 800; 12-15, similar monadiform germs in their primarily 

 attached and variously aggregated free-swimming states, as seen with a 

 s'g-inch objective, x 2500; i6 and 17, succeeding biflagellate condition of 

 the same germs, x 800. 



18. Heteronema caudata, Duj, sp., developed front the mass of the macrospores 



delineated at Fig. 2 r, x Soo. 



19. Heteromita lens. — Adult monad, x Soo. 



Figs. 20-46, Illustrating the Protozoic N.-vture of the Myxomycetes or 

 Mycetozoa, as discussed at Chapter II. page 41 et seq. (Figs. 32-35 and 

 45-47 after C1ENK.0WSKI, the remainder after a. de Bary). 



20. Arcyria incarnata. Pars. — Two sporocysts or sporangia ; the one at a burst 



and protruding its sporiferous rete or capiUitium, x 15. 



21. Physarum plumbeum, Fries. — Numerous associated sporangia, slightly 



enlarged. 



