154 



NATURAL HISTORY 



and passes through all the gradations of the preceding 

 species. They are found in most vegetable infusions 

 during the summer. 



356. VoRTicELLA i:;ana — V. truncatella — Y.fritiliina. 

 — These species of Miiller, and some of the following, 

 appear to differ so little from some of the forms of the 

 Convallaria and Citrina, that I shall merely refer to those 

 figures which they most closely resemble. This is like 

 figure 221, with a circle of cilia around their upper edge. 



357. YoRTicBhL A papillaris. — (See fig. 218.) 



358. . cirrata.— {See fig. 202) : the lower 



end is more convex, and furnished with cilia, while the 



359. VoRTiCELLA sacculus, is without them. 



360. ■ nasuta, (see fig. 217). — This ani- 

 malcule is said to have bands of cilia around various 

 parts of the body. 



361. VoRTicELLA scyphlfia — V. hamata — V. crateri- 

 formis. — Figure 204, without a stem. 



362. Y oRTicELL A stellina, {Trichodina, ^.) — This ani- 

 malcule is described as surrounded with a halo, from 

 which the cilia radiate; size, 1 -288th of an inch. 



363. VoRTicELLA disciua. — This singular creature, 

 found in salt water, is shewn at figure 210. 



364. VoRTicELLA Iwiacina only differs from the Con- 

 vallaria in the dome of the bell being attached to some 

 foreign substance, without the intervention of a stem, 

 (see fig. 215.) 



365. VoRTicELLA crategaritt. — These live in clusters, 

 and are most commonly found in April attached to the 



