54 CLASS I. 



Enchelys MUELL. (exclusive of several species 1 ), Acomia 

 DUJARD., Gastrochceta ejusd., Alyscum ejusd., Uronoma ejusd. 



Bursaria MUELL. (in part) , DUJARD. (Bursaria and Spirostomum 

 EHRENB. in part.) Body everywhere ciliated, often dilated pos- 

 teriorly ; mouth oblique surrounded by cilia arranged spirally. 



. Sp. Bursaria, truncatella MUELL., Infus. Tab. xvn. figs. 14 j EHRENB. 



InfusionstJi. Tab. xxxiv. fig. 5. 



To this division EHRENBERG refers the Opalina Ranarum of PURKINJE and 

 VALENTIN, first discovered and figured by LEEUWENHOECK : Ontledinyen 

 en Ontdelkingen 1685, p. 13, fig. 3, A. DUJARDIN and VON SIEBOLD [and 

 STEIN.] do not admit the presence of a mouth in this species, the first two 

 retain the genus Opalina. [STEIN, suspects the Opalina to be larvae of 

 worms. The different species have very different structure. Die Infu- 

 sionstJi. s. 182 187.] 



Ophryoglena EHRENB. Body rough with cilia disposed in lon- 

 gitudinal rows, ovate, with eye-point black or red. 

 See Fig. in EHRENB. Tab. XL. figs. 6-8. 



Spirostomum EHRENB. in part, DUJARD. 



Glaucoma EHRENB. Body everywhere ciliated, mouth un- 

 armed, with a tremulous valve like a longitudinal lip. 



Sp. Glaucoma scintillans EHRENB., InfusionstJi. Tab. xxxvi. fig. v., DUJARD. 

 Infus. Tab. VI. fig. 13. 



Chilodon EHRENB. Body oval, with a lateral sinus forwards, 

 cilia all over disposed in longitudinal rows, mouth inclosing a cylin- 

 drical fasciculus of little rods (teeth). 



Sp. Chilodon cucullulms, Kolpoda cucullulus MUELL., EHRENB. InfusionstJi. 

 Tab. xxxvi. fig. vi., DUJARD. Infus. Tab. vi. fig. vi. [STEIN. Infusionsth. 

 Tab. m. 51.] 



Nassula EHRENB. 



Lacrymaria EHRENB. (and Trachelocerca ejusd.) 



Sp. Lacrymaria olor EHRENB., Vibrio olor MUELL., Infus. Tab. x. figs. 12-15, 

 EHRENB. InfusionstJi. Tab. xxxvm. fig. vn. 



Colpoda EHRENB. (Species from the genus Colpoda MUELL.) 

 Body laterally emarginate" or sinuous, reniform, with cilia disposed 

 in rows, mouth lateral unarmed. 



Sp. Colpoda cucullus MUELL., Infus. Tab. xiv. figs. 7-14, EHRENB. Tab. 

 xxxix. figs. v. &c. 



Paramecium MUELL. (exclusive of species), EHRENB. (in part), 

 DUJARD. 



1 Nothing can be more capricious than the use by modern writers of this generic 

 name of MUELLER. See DUJARDIN, Hist. not. dcs Infvs. pp. 385, 386. 



