ROTATORIA. 205 



Lindia DuJARD.V 



Note, Genus Albertia DUJARD. is distinguished by a shield in 

 front of the rotatory organ and by a tail which is conical, short, un- 

 divided. Body cylindrical, elongate. It lives parasitically, in the 

 intestinal tube of earth-worms and slugs. Comp. Ann. des Sc. nat. 

 2e serie, Tom. x. p. 175, Tab. n. 



Family V. Philodinasa EHRENB. (Rotifera DUJARD.) Animals 

 swimming freely or creeping (after the manner of geometric cater- 

 pillars). Body elongate, fusiform, contractile into a ball. Rotatory 

 organ double. Tail articulate, furnished posteriorly with little 

 horns or styles. The stapediform maxillae with two parallel teeth, 

 sometimes with three. 



Rotifer Cuv. 1 (The characters of the family.) 



a) Without proboscis. 



Typhlina EHKENB. (and Hydrias ejusd. Ocelliform points none). 

 Monolabis EHRENB. Ocelliform points two. 



b) Anterior process retractile, proboscidean. 

 *) Ocelliform points none. 



Calladina EHRENB. 



**) Ocelliform points two. 



Philodina. The ocelliform points situated behind the proboscis. 



Sp. Philodina erythrophthalma EHRENB., Organisation, Systematic, &c. 

 Berlin, 1830, Tab. vii. fig. 2; Infusionsth. Tab. LXI. fig. 4; by former 

 writers confounded with Rotifer vulgaris. DtJJARDlN names this species, 

 with which he thinks some other species of Philodina EHRENB. ought to 

 be united, Rotifer inflatus, Inf moires, PI. 17, fig. i. 



Rotifer EHRENB. (and Actinurus ejusd.). Ocelliform points situated 

 at the anterior part of the proboscis. 



Sp. Rotifer vulgaris SCHRANK, EHRENB., Furcularia redhiva LAM., Vorticella 

 rotator ia MUELL., Infusor. Tab. XLII. figs, ir 16; EHRENB. Organisat., 

 Systematic, &c. 1830. Tab. vii. fig. i, Infusionsth. Tab. LX. fig. 4; DUJAR- 

 DIN, Inf moires, PI. 17, fig. i. 



This Wheel-animalcule was first discribed and figured by LEEUWENHOECK 

 in 1702. (Sevende vervolg der Brieven, i ^ ste Missive, bl. 406). He observed 



Tableau elcmrntaire, 1798, p. 653. 



