296 DESCRIPTION OF [Pott/ga.slrica. 



saria has a large, white, ovate, turgid body, truncated and 

 broadly excavated in the front, which has a simple row of 

 cilii. In some specimens, Ehrenberg saw half-digested 

 Rotiferae, and large quantities of vegetable matter, in the 

 nutritive cells, and was able to see the canal fill itself with 

 carmine, but could not follow the whole course of it. In 

 each cell the food is surrounded by a clear fluid, which 

 Ehrenberg calls bile. A large bright bladder is seen be- 

 low the mouth, and somewhat to the left of it, on which 

 side is a large curved but not articulated gland, reaching 

 to the brow or front. Found in ditches, in woods, amongst 

 rotten beech leaves. Size l-48th to l-36th. 



477. BuBSARiA vorticella. The bell-shaped Bursaria. 

 — Body white, large, nearly spherical, and turgid; the 

 anterior truncated, and widely excavated, having a double 

 row of cilii. Found with Chlamidomonas pulvisculus and 

 Gonium pectoral e, some of which are seen within it in 



Jig. 29 A. Size 1-1 08th. 



478. Bursaria vorax. The voracious Bursaria. — Body 

 large, oblong, rounded at the ends ; mouth ample, being 

 one third the length of the body, and touching the summit 

 of the frontal region. This species has great resemblance 

 to Urostyla grandis and Stylonychia lanceolata, when their 

 claws and styles are Avithdrawn. Found, in summer, in 

 muddy water. Size 1 -140th to 1 -108th. 



479. Bursaria entozoon. The worm Bursaria has a 

 large cylindrical, turgid body, nearly equally rounded at the 

 extremities ; small mouth, situated under the frontal apex. 

 Found, with the following, in the rectum of Rana tempo- 

 raria, in summer and winter. 



480. Bursaria inlestiualis {Vibrio vermicu/us. M.) 



