204 CLASS VI. 
Sp. Enteroplea hydatina Eurens. Tab. xivi. fig. 1, Dusarp, Jnfusoires,. 
Jab seg tae ee 
Hydatina Eurens. Body oval, anteriorly truncate. Maxille 
digitate at the extremity, terminated by teeth five in number, free. 
Ocelliform points none. 
Sp. Hydatina senta, Vorticella senta Murtu., Infusor. Tab. x11. figs. 8—r4 ; 
EBRENB. Organisation, Systematik, &c. 1830, Tab. vit. Infusionsth. XLVI. 
fig. 2 ; this is the animal in which EHRENBERG first demonstrated the com- 
posite structure of the Rotatoria. 
Notommata EXRENB. (in part). Body oval or oblong, posteriorly 
narrower, anteriorly truncate. Maxille digitate, with several teeth 
at the extremity. Ocelliform point single, forward, dorsal, or 
several points clustered. 
Sp. Notommata clavulata ERRENB., Organisation in der Richtung d. kl. 
Raumes, 3tter Beitrag, Tab. x. fig. 1, Infusionsthierchen, Tab, L. figs. 5, &e. 
Cycloglena lupus EuRENB., Infusionsth. Tab, Xvi. fig. 10, (the form of 
the maxillz not yet accurately known). 
Syncheta Kurens. Body broad anteriorly. Rotatory organ 
armed with styles. Ocelliform point single, anterior, dorsal. 
Sp. Syncheta baltica EHRENB., Infusionsth. Tab, Liu. fig. 5 ; phosphorescent, 
in the Baltic, &e. 
Furcularia LAM. (in part), Dusarp. Maxille forcipate, with 
extremity usually undivided and acuminate, or bidentate, protrac- 
tile as far as the margin of the rotatory organ. 
a) Ocelliform point none. Plewrotrocha EHRENB. 
Sp. Pleurotrocha constricta KHRENB., Jnfusionsth. Tab. XLVIII. figs. 1, &c. 
6) Ocelliform point single. Furcularia and Scaridium EHRENB. 
Sp. Furcularia gibba EHRENB., Infusionsth. Tab. XLviI1. figs. 3, &e.—Fureul. 
longicauda Lam., Trichoda longicauda Munrut., Jnfusor. Tab. Xxx1. figs. 
8—to, Scaridium longicaudum EnRens., Infusionsth. Tab. Liv. fig. 1, 
with a hook in front on the wheel-organ and a very long tail, by which the 
animal progresses in the water by leaps. 
c) Ocelliform points two (Diglena and Distemma EHRENB. exclusive of 
Distemma marinum ejusd.) 
Sp. Furcularia forcipata, Cercaria forcipata and vermicularis Munu., Infu- 
sor. Tab. Xx. figs. 183 —23 ; Enrens. Jnfusionsth. Tab. Lv. fig. 1, Dekinia 
vermicularis, MORREN Bijdragen tot de natuurk, Wetensch. V. pp. 227, &e. 
d) Ocelliform points three (Triophthalmus, Eosphora EHRENB.) 
e) Ocelliform points numerous, disposed in two clusters (Zheorus 
EHRENB.) 
