Vorticellina.] THE INFUSORIA. 267 



latter, however, is spherical in E. nutans. Self-division 

 has been seen in E. anastatica, galea, plicatilis, flavicans, 

 leucoa, digitalis, and nutans ; and it is probable that the 

 free forms possess transverse division. In E. nutans and 

 plicatilis, gemmae have been seen ; but these are never 

 produced by the stalk. 



405. Episttlis galea. The helmet Epistylis is large, 

 has a conical body, contractile by transverse folds ; mouth 

 lateral and projecting, pedicle thick, branched, and arti- 

 culated. Found upon Ceratophyllum. Size of body 

 l-120th. 



406. Epistylis anastatica {V. anastatica, crataegaria et 

 ringens, M.) The rose of Jericho Epistylis has an oval body, 

 without folds, the frontal margin dilated and projecting, 

 and the pedicle dichotomous, smooth, or squamulous, with 

 foreign particles. Stomach-cells and a united mouth are 

 to be observed, but the alimentary canal has not yet been 

 seen. The granules of ova are white by reflected light, 

 and yellowdsh by transmitted. The clear bladder-like 

 gland is often to be seen, but not its contraction. Growth 

 of gemmae unknown ; self- division longitudinal. Found 

 upon Ceratophyllum, and also upon small-shelled water 

 Molusca. Size l-280th ; height of little tree 1- 140th; 

 ova l-12000th; cyclus of development l-12000th to 

 1 -280th. 



407. Epistylis plicatilis {V. anularis et pyraria, M.) The 

 folded Epistylis. — Body conical and elongated, contractile in 



folds, frontal margin dilated, truncated, and slightly project- 

 ing. Pedicle dichotomous ; smooth, or, when foreign bodies 

 adhere, having a scaly appearance. They are often corym- 

 bose. This species is white to the naked eye, but some- 



