PL A TE XX. 



EXPLANATION. 



FIG. 



1. PARAMONAS GLOBOSA, From, sp., vol. i. p. 370, x 400 (Fromentel). 



2. PARAMONAS STELLATA, From, sp., vol. i. p. 370, x 400 (Fromentel). 



3. PETALOMONAS MEDIOCANELLATA, St., vol. i. p. 371, x 350 (Stein). 



4. PETALOMONAS SINUATA, St., vol. i. p. 372, x 400 (Stein). 



5,6. PETALOMONAS ABSCISSA, Duj. sp., vol. i. p. 371, dorsal and ventral views, 

 x 500 (Stein). 



7. PETALOMONAS ERVILIA, St., vol. i. p. 372, x 400 (Stein). 

 8,9. PETALOMONAS IRREGULARIS, St., vol. i. p. 372, x 1250. 



10-12. ATRACTONEMA TERES, St., vol. i. p. 373. 11, Animalcule dividing by longi- 

 tudinal fission ; 1 2, example without flagellum, and with the endoplast 

 enlarged and broken up into* germinal elements, x 640. 



13, 14. PHIALONEMA CYCLOSTOMUM, St., vol. i. p. 373, x 500. 14, Variety with spirally 

 ribbed cuticle (Stein). 



15, 16. MENOIDIUM PELLUCIDUM, Pty., vol. i. p. 374. 15, As observed by the author; 

 1 6, after Stein, x 600. 



17-21. ASTASIA TRICHOPHORA, Ehr. sp., vol. i. p. 376. 17, Typical adult zooid, after 

 Biitschli, x 600; 18, example with internal germ-like bodies, after Carter ; 

 19-21, various polymorphic forms. 



22. COLPODELLA PUGNAX, Cienk., vol. i. p. 378. Three animalcules parasitically 



attached to a cell of Protococctts, x 500 (Cienkowski). 



23. SPIROMONAS DISTORTUM, Duj. sp., vol. i. p. 298, x 600 (Dujardin). 

 24-25. EUGLENA ACUS, Ehr., vol. i. p. 383. 25 and 26, after Stein, x 300. 



26. EUGLENA OXYURIS, Schm., vol. i. p. 383, x 200 (Stein). 



27, 28. EUGLENA SPIROGYRA, Ehr., vol. i. p. 382. 27, Normal extended animalcule, as 

 observed by the author, at a a, amylaceous corpuscles, x 240 ; 28, con- 

 tracted phase (Stein). 



29-51. EUGLENA VIRIDIS, Ehr., vol. i. p. 381. 29, Animalcule with a bulbous distal 

 termination to the flagella, after W. H. Robson ; 30-33, polymorphic con- 

 tours assumed at will by the same animalcule, x 200; 34, typical form, 

 x 600 ; 35, anterior extremity, with of, funicular oral fossa, c v, contractile 

 vesicle, and e, eye-like pigment-spot ; 36, animalcule with large ovate inter- 

 nally developed germs ; 37, an example with enclosed irregularly shaped 

 amrebiform germinal bodies ; 38 and 39, transparent varieties (E. hyalina, 



