CLASSIFICATION. 



remote in their structure and appearance from any 

 with which w^e are elsewhere familiar. Let the 

 reader cast his eye for a moment upon the annexed 

 engraving (Fig. 2), which represents a piece of duck- 

 weed gathered from a neighbouring pond, surrounded 



Fig. 2. 



-MICROSCOPIC OCCUPANTS OP A LEAF OF DUCKWEED. 



Highly Magnified. 



1. Torticella convallaria. 



2. Yolvox globator. 



3. Vaginicola crystallina. 



4. Amphileptus fasciola. 



5. Xavicula hippocampus, 



6. Amoeba diffluens. 



7 . Trachelocerca olor. 



8. Polytoma uvella. 



9. Stevtor polyTYiorphus. 



10. Bursaria tnincateUa. 



11. Pandorina moruvi. 



12. Stylonychia mytilus. 



13. Paramecium aurelia. 



14. Euplotes ti-uncatus. 



15. Euplotes striatus. 



by the microscopic creatures that live in its vicinity. 

 Some fixed upon the stem (Fig. 2, 9) like trumpets in 

 their shape, spread out their gaping mouths, around 

 which whirl the swarming atoms that they swallow ; 

 others, like wine-glasses in miniature, stretch out the 

 little bells that constitute their bodies, to the length 

 of their transparent stems in search of food, or if 

 alarmed, folding their stalks in spiral revolutions, 

 shrink timidly from danger (Fig. 2, 1). 



The Yolvox (Fig. 2, 2) silently revolves, a little 

 world within itself. Others (Fig. 2, e) of different 

 shape, resemble films of ever-changing cloud. Others, 



