INFUSORIA. 59 
Epistylis KHRENB. (and Opercularia ejusd.) The animal coni- 
cal or campanulate, with rigid pedicle, simple, or branched from 
imperfect spontaneous division. 
Sp. Zpistylis favicans EHRENB., Vorticella umbellaria LAM., ROESEL, Jns, II. 
Suppl. Tab. c. ;—Opercularia articulata EHRENB., ROESEL, ib. Tab, XcVIII. 
figs. 5, 6, &e. 
B. Loricated. 
Tintinnus EHRENB. 
Sp. Tintinnus inquilinus, Vaginicola inquilina Lam. 
previously existing, whilst the other has the beginning of its stem solid, and afterwards 
a canal and streak not continuous with those previously existing. 
In Zoothamnium a continuous canal runs through the stem and all the branches of 
the colony, and the streak also divides at every fork, so that all the streaks and canals 
are in connexion, STEIN, op. cit. pp. 82—84.] 
