356 0. T. HUDSON. 



GENERA.» 



1. Flosculariadsc . Floscularia (fig. 11), StcpLaiioceros (fig. 10). 



2. Melicertadse . . Melicerta (fig. 9), Limuias, (Ecistes, Ceplialosiphon, 



Lacinularia, Megalotrocha, Conocbilus. 



3. Philodinadae . . Philodina (fig. 13), flotifer, Callidina. 



4. Hydatinadse . . Hydatina (fig. 1), Rhinops. 



5. Syncbsetadse . . Synchseta (fig. 3), Polyarthra. 



6. Notommatadae . Notommata (fig. 4), Diglena, Furcularia, Scaridium, 



Pleurotrocha, Distemma. 



7. Triarthradse . . Triarthra (fig. 8). 



8. Asplauchnadse . Asplanclina (fig. 2). 



9. Brachionidse . . Brachionus (fig. 7), Noteus, Anursea, Sacculus. 



10. Pterodinadse . . Pterodina (fig. 6), Pompbolyx. 



11. Euchlanidse . . Euchlanis (fig. 5), Salpina, Diplax, Monostyla, Co- 



luruSjMonura, Metopidia, Stephanops,Monocerca, 

 Mastigocerca, Dinocharis. 



12. Pedaliodiidae . . Pedalion (fig. 12). 



' Tlie principal ones ; several of Ehreiiberg's are omitted for various reasons 

 tbat cannot bere be detailed ; and tbe genus Notommata, tbougb tbe name is 

 retained, is bere supposed to bave lost a large number of Ebrenberg's 

 species. 



Tbe tbirteen figures, given as illustrations of tbe various families, are 

 not drawn on tbe same scale ; and no attempt bas been made to sbow in tbem 

 all tbe details of internal structure. 



