478 



GENERAL HISTORY OF THE INFUSORIA. 



or secondary circlets, and into Zygotroclia, where the organ consists of two 

 (a pair of) symmetrical wreaths. 



The further division of these sections into families was founded on the 

 circumstance of the animals being either loricated or not loricated ; and the 

 distribution into genera was made, primarily, according to the number and 

 disposition of the red eye-specks, and in a secondary degree, according to 

 the characters of the jaws and teeth, or of those of the foot-process, or other- 

 wise, more rarely, of the lorica. 



This classification we present in a tabulated form for convenience of 

 reference. 



CLASS ROTATOEIA, ACCOEDING TO EHRENBERG'S SYSTEM. 



FAMILIES. 



lUoricated : 

 thydina . . 



Ich- 



Loricated: CEcistina 



SECTION I. MONOTROCHA. 



' eyes absent 



GENERA. 



hail- absent ( with truncated foot Ptygura; 



[ with lorked foot Ichthydium. 



hair present Chaetonotiis. 



Glenophora. 



f loricae distinct (Ecistes. 



[ loricoe agglomerated Conochilus. 



Illoricated : 

 lotrochaea 



eyes absent Cyphonautes. 



Tone eye Mierocodon. 



eyes present 



[ two eyes Megalotrocha. 



Loricated : Floscu- 

 lariasa 





Euchlanidota... eyes absent 



'^eyes absent Tubicolaria. 



one eye (when 



young) Stephanoceros. 



[ rotarv orffan bifid I ^'^^^^^ distinct Limnias. 



two eyes (when J J S | urceoli agglomerate Lacinularia. 



young) 1 rotary organ 4-fid Melicerta. 



[ rotary organ 5-6-fid Floscularia. 



SECTION II. SOROTROCHA 

 Division I. Polytrocha. 



{no teeth Enteroplea. 

 f fv, r jaw many-toothed Hydatina. 

 ^^^^'^ I jaw one-toothed Pleurotrocha. 



f frontal Furcularia. 



foot styliform Monocerca. 



r frontal cilia alone Notommata. 



one eye . . . -^ cervical \ foot furcate \ do. with styles Synchaeta, 



[ do. with imcini Scaridium. 



foot absent ; body with lateral cirrhi. . Polyarthra. 



(\ . ■, ( foot furcate Diglena. 

 irontal ... I r drrhi on neck Triarthra. 

 1 ^«^t ^^yl^^^^^ 1 cirrhi wanting Ratulus. 

 cervical . . .foot furcate Distemma. 



r Triophthalmus. 



three eyes \ Eosphora. 



[ Otoglena. 



eyes numer- f Cycloglena. 



ous I Theorus. 



' Lepadella. 

 Monostyla. 

 Mastigocerca. 

 Euchlanis. 

 Salpina. 

 Dinocharis. 

 Monura. 

 Colurus. 

 Metopidia. 

 Stephanops. 

 Squamella. 



