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. Floscularie. Tentacles or lobes around the mouth 
(with rotatory organ deeply cloven Enrens.), furnished with cilia. 
Body affixed by a pedicle. 
The hairs of this wheel-animalcule are, according to Dusarpin, 
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 
“* (Beitrige zur Naturgesch. der kleinsten Wasserthiere, s. 21). 
FPloscularia OKEN, Enrens. 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. loseularia ornata EnREens., Der Fénger Ercnnorn |. ]. Tab. 11. figs. 
G—t, p. 39; EHRENB. Organisation in der Richt. des kl. Raum. 3tter. Beitr. 
Tab. vit. fig. 2 ; Infusionsth. Tab. xvi. f. 2; Dusarp, Infusoir. Pl. 19, 
figs. 7, &c. 
