OF ANIMALCULES. 143 



ferior side ; the first situated near the head, and the 

 other near the middle of the body. 



338. HiMANTOPUs sannio, — This animalcule is nearly 

 as broad as it is long : the head is ciliated, and has two 

 long vibrating cilia; the posterior is acute, and fur- 

 nished with a small cluster of short hairs ; polygastric 

 sacs may be discerned within it. Found among lemna, 



339. HiMANTOPus volutator. — The revolving Uiman- 

 topus is a small, bent animalcule, with the upper 

 margin fringed, and the inferior one furnished with 

 four hook-like setae. 



, 340. HiMANTOPus charon, — The hoat-shaped Himan- 

 topus resembles the Kerona patella, figure 323 ; but the 

 terminal cilia are long and wavy, not stiff: the body is 

 long in proportion to its breadth, and there are longi- 

 tudinal markings on each side of its pellucid envelope. 

 Scarce. Found in sea-water. 



341. HiMANTOPus corona, — This animalcule is shewn 

 at figure 196. It is very thin, and the cilia, bristles, 

 and vibrating hairs, are disposed in the manner shewn in 

 the drawing. 



