CLASS! PICA TION. 



The Volvox (Fig. 2, 2) silently revolves, a little world within 

 itself. Others (Fig. 2, 6), of different shape, resemble films of ever- 

 changing cloud. Others, again, transparent globes of jelly (Fig. 

 2, n), shoot forth star-like rays in all directions. Some have the 

 form of glass-like shuttles, coloured with bright green contents, 

 creeping more slowly than the hour-hand of a watch along the 

 bottom. Some (Fig. 2, 8) have the shape of rolling mulberries, 

 that gently make their way through the surrounding water. 



FIG. 2. MICROSCOPIC OCCUPANTS OF A LEAF OF DUCKWEED. 



1. Vorticella convallana. 



2. Volvox giobator. 



3. Vaginicola crystalline,. 



4. Amphileptus fasciola. 



5. Nai/icula hippocampus. 



Highly Magnified. 



6. Amoeba, dijfluens. 



7. Trachelocerca olor. 



8. Polytoma nvella. 



g. Stentor polymorphus. 

 10. Bursaria truncatella. 



11. Pattdor 



12. Stylonychia ntytilus. 



13. Paratnecimn aureha. 



14. Euplotes truncatus. 



15. Enplotes striatus. 



Others (Fig. 2, f), like swans in form, glide up and down with 

 graceful elegance. The Vaginicola* (Fig. 2, 3) lives in a crystal 

 vase, from which it sketches itself forth in search of nourishment. 

 The Paramecium^ (Fig. 2, 13), like a meteor, shoots along, prowl- 

 ing in all directions ; some (Fig. 2, 14, 15), clad in shells, and 

 armed with leg-like hooklets, creep much after the manner of 

 insects ; while others skip from point to point like living scintil- 

 lations. Such are the creatures that we find in swarms in every 

 stagnant ditch, as any one possessed of a very ordinary micro- 

 scope may soon convince himself. These wonderful organisms 

 have little resemblance to each other. It is difficult, indeed, with 



* Vagina, a sheath ; colo, 7 inhabit. 



, paramekes, oblong. 



