270 ZOOLOGT. 



5. Leucophta. Animal ciliated on every part : size as the 



last genus. 



6. Gonium. Animal simplCj flat, angular : size as the last. 



7. Colpoda. Animal simple, pellucid, flat, sinuated : size 



as the last« 



8. Paramecium, ^nfffjtf/simple, pellucid, flattened, oblong: 



size as the last. 



9. Cyclidinm. Animal orbicular or oral, simple, pellucid, 



flattened : size as the last. 



10. Burs aria. Animal simple, membraneous, hollow. 



H. Vibrio. ^«/?«aJ simple, round, elongated: inyisible 

 ■without a Microscope. 



12. Enchelis. Animal simple, cylindrical : size as the last. 



13. Bacillaria. Body composed of cylindrical filaments, 

 placed parallel to each other, and often changing their 

 position. 



14. Volvox. Animal simple, pellucid, spherical : invisible to 

 the naked eye, 



15. Monus. Animal oi the most simple form, being a mere 



point, quite pellucid, and invisible without the aid of a 

 good Microscope. 



1 



