270 ^^' J- Dewitz: 



Farn. 6. Notommatadae. 

 Trochal disc oblique ; wreath of interrupted curves and Clusters ; 

 trophi virgate or forcipate; bräin large, sack-like; foot furcate. 

 Notoramata, Diglena, Furcularia, Scaridium, Pleurotrocha, Distemma. 



Farn. 7. Triarthradae, 

 Trochal disc transverse ; wreath Single, marginal; trophi malleo- 

 ramate; foot abseut. Triarthra. 



Farn. 8. Asplanchnadae. 

 Trochal disc rounded ; wreath Single, marginal ; trophi incudate ; 

 intestine, anus, and foot absent. Asplanchna. 



b) Loricated. 



Fam. 9. Brachionidae. 



Trochal disc transverse with ciliated prominences; wreath Single, 



marginal; trophi malleate; lorica entire, simple; foot transversely 



wrinkled, wholly retractile, 2-toed or absent. Brachionus, Noteus, 



Anuraea, Sacculus. 



Fam. 10. Pterodinadae. 

 Trochal disc two transverse circular lobes; wreath on each double, 

 marginal; trophi malleo-ramate; foot transversely wrinkled, wholly 

 retractile, ending in a ciliated cup. Pterodina, Pompholyx. 



Fam. 11. Euchlanidae. 

 Trochal disc rounded ; wreath in interrupted curves, and Clusters ; 

 trophi sub- malleate or virgate; lorica in two parts, meeting in a 

 furrow, or entire with additional pieces; foot jointed, feebly retrac- 

 tile, not telescopic or transversely wrinkled -furcate or stylate. 

 Euchlanis, Salpina, Diplax, Monostyla, Colurus, Monura, Metopidia, 

 Stephanops, Monocerca, Mastigocerca, Dinocharis. 



Order IV. Scirtopoda. 

 That swim with their ciliary wreath, and skip by means of 

 hoUow limbs with internal locomotor muscles. 



Fam. 12. Pedalionidae. 

 Trochal disc transverse; wreath two marginal curves with mouth 

 between ; trophi malleo-ramate ; foot replaced by two posterior ciliated 

 processes, Pedalion. 



8d. Derselbe, On four new species of tlie Grenus 

 Floscularia, and five other new species of Rotifera. 



