Vorticellhia.] THE INFUSORIA. 269 



l-5760thto l-6000th; cyclus of development, consequently, 

 l-6000th to 1 -120th. 



411. Epistylis digitalis {V. digitalis, ringens et incli- 

 nans, M.) The thimble Epistylis. — Body small, cylin- 

 drical, campanulate, dichotomous, and finely annulated. 

 This well-marked form infests the Cyclops quadricornis, 

 drawn and described in the Microscopic Cabinet. It 

 sometimes completely envelopes it. Ehrenberg says 

 it does not appear to be deadly to it ; but I consider it a 

 disease. In its beautiful little tree, the Notomraata petro- 

 myzon nestles just like a bird in a bush, and fastens its 

 eggs to its branches ; coloured food is readily taken in by 

 this animalcule, and fifteen large stomach-cells have been 

 counted. Size 1 -430th ; tree l-20th. 



412. Epistylis (?) nutans. The nodding Epistylis. — 

 Body ovate, attenuated at both ends ; mouth distinctly 

 two-lipped and prominent. The pedicle is branched and 

 annulated. {See fig. 245 and 246.) This animalcule, says 

 Ehrenberg, " can push forth a bladder between its lips, like 

 (si parva licet componere magnis) a camel can its palate 

 veil (gaumen segel) ?" Size l-430th; tree l-24th. 



413. Epistylis botritis. The botritis Epistylis has a 

 very small ovate body, crowned with cilii. They resemble 

 grapes upon a simple hyaUne pedicle. Size l-2400th; 

 tree 1 -240th. 



414. Epistylis vegetans {Volvox vegetans, M.) The 

 plant-like Epistylis has a very small ovate body, crowned 

 with cilii (?) they are disposed in clusters, like the pre- 

 ceding, upon a branched pedicle, of a yellow colour. When 

 the water containing this species is coloured with indigo, 

 strong currents are seen at the front or head of each 



