l62 



AQUATIC MICROSCOPY FOR BEGINNERS. 



17. PARAMy*:ciUM (Fig. 125). 



This is often called the "slipper animalcule" from 

 its shape. It is frequently found in the ponds, but is 

 especially abundant in vegetable infusions. The 

 hollow place resembling the opening in the slipper for 

 the foot, is the part leading to the mouth near the' 

 center of the lower surface. The whole body is cov- 

 ered with fine cilia, and sometimes a cluster of longer, 

 coarser cilia is noticeable on the posterior extremity of 

 the body. In the writer's locality this cluster of cilia 

 is present on all the specimens; I have never seen a 

 Paramcecium without it. This Infusorium increases 

 rapidly by dividing into two parts across the middle. 

 Its movements are rapid. 



Fig. T25. — Paramaecium. 



Fig. 126. — Eupl6tes. 



18. Eupl6tes (Fig. 126). 



This is one of the walking Infusoria, the cilia on 

 the fiat lower surface being very large and strong, the 

 animal using them for swimming, or it walks about 

 the. slide or climbs among aquatic plants by resting 

 part of its weight on their tips as if they were legs. 

 When the creature happens to be turned on its back, 

 these large ciha may often be seen pattering irregularly 

 against the cover-glass. They vary in number from 

 ten to twelve. The front border has a row of finer 



