EXPLANATION OF TLxiTE J.T-Confumed. 



Fig. 13. — Monas vinosa : Monads in lively movement and in division ; the 

 flagella were not clearly seen, x 600. 



Fig. 14. — Rhabdomonas rosea ; slowly moving monads ; * in the act of 

 division, x 600. 



Fig. 15. — OpMdomonas {Spirillum) sanguinea ; Monads with flagellum at 

 one, at both (*) ends : ** semilunar form, x 600. 



Fig. 16. — Spirochmfe Obermeieri ; screw-fibres, actively moving among 

 blood-corpuscles (**) ; * shortly before the cessation of the fever, x 600. 



Fig. 17. — Bacillus ruber: rods, forming red spots on rice. 



Fig. 18. — Micrococcus fulmis : colonies, forming rust-red drops of mucus 

 on horse-dung. 



All the figures were drawn with Hartnack's objectives. Figs, 10 by Dr. 

 Kirchner, 16 by Dr. Weigert, and the rest by Cohn. 



The explanation of Plate XXI, illustrating Mr. Archer's 

 Resume of Recent Contributions to our Knowledge of 

 ''Freshwater Rhizopoda," will be given with the next 

 number. 



