SYSTEMATIC 

 ARRANGEMENT OF ROTATORIA, 



CLASS VI. 

 ROTATORIA. 



MICROSCOPIC animals, contractile, crowned with vibratile cilia at 

 the anterior part of the body, which by their motion often resemble 

 a wheel revolving rapidly. Intestine distinct, terminated at one 

 extremity by a mouth, at the other by an anus ; generation ovipa- 

 rous, sometimes (periodically) viviparous. 



ORDER SINGLE. Rotatoria. 

 (The characters of the class are those of the single order.) 



Family I. Floscularice. Tentacles or lobes around the mouth 

 (with rotatory organ deeply cloven EHRENB.), furnished with cilia. 

 Body affixed by a pedicle. 



The hairs of this wheel-animalcule are, according to DUJARDIN, 

 PELTIER and other observers, not vibratile cilia, but are capable 

 individually of expansion and contraction ; EHRENBERG, who admits 

 that these hairs may for a long 'time continue at rest and be flaccid, 

 still maintains that they occasionally vibrate, and refers to EICHHORN 

 who perceived the same thing in his crown-polyp, Stephanoceros 

 (Seitrdge zur Naturgesch. der kleinsten Wasserthiere, s. 21-). 



Floscularia OKEN, EHRENB. Body clavate, or campanulate, 

 anteriorly expanded, five or six lobes sustaining a fasciculus of long 

 cilia. A vagina transparent, cylindrical, often covering the solitary 

 animal. 



Sp. Floscularia ornata EHRENB., Der Fdnger EICHHORN 1. 1. Tab. in. figs. 

 G L, p. 39 ; EHRENB.- Organisation in der Richt. des Id. Raum. ^tter. Beitr. 

 Tab. vni. fig. 2 ; Infusionsth. Tab. XLVI. f. 2 ; DUJARD. Infusoir. PI. 19, 



figs. 7, &c. 



