üebersicht des Systems. 



139 



Melanopsis, Fer. 



Subg. Melanopsis s. str. 



— Microcolpia, Bourg. 



— Canthidomus, Sw. 



— Lyrcaea, Ad. 



M. praemorsa, L. 

 M. acicularis, Fer. 

 M. costata, Fer. 

 M. dufourei, Graells. 



Familie Moitessieritlae. 



Moitessieria, Bourg. 

 Lhotelleria, Bourg. 



M. simoniana, Charp. 

 L. letourneuxi, Bourg. 



Familie Valvatide. 



Valvata, Müll. 



Subg. Conciona, Jeffr, 



— Tropidina, Ad. . 



— Gyrorbis, Fitz. . 



— ? Jelskia, Bgt. . 



— Andrusovia, Brus. 



V. piscinalis, Müll, 

 V. pulchella, Stud. 

 y. cristata, Müll, 

 V. jelskii, Crosse 

 A. dybowskii, Brus. 



ß) A s p i d b r a D c h i a, 

 Familie Neriticlae. 



Neritina, Lam, 



Subg. Neritaea, Roth 



— Theodoxus, Montf. 



— Ninnia, Brus, . 



N. nilotica Rve. 

 N. fluviatilis, L. 

 N. schultzei, Grimm. 



B. Malacozoa Acephala. 



Sphacrium, Scopol! 

 Subg. Cyclas, Brug. 

 Sectio Cyclas s. str. , 



— Cyrenastrum, Bourg. 



— Corneola, Cless. , 

 Subg. Calyculina, Cless, 



Pisidium, C. Pfeiffer 

 Subg. Fluminina, Cless. 



— Rivulina, Cless. . 



— Fossarina, Cless, 

 Eupera, Bourg . 



1. Isomya. 



a) Siphonidae. 

 Familie Spliaeriidae. 



Sph. rivicola, Leach 

 Sph. solidum, Norm, 

 Sph. corneum, L. 

 Sph. lacustre, Müll. 



P. amnicum, Müll. 

 P. supinum, Ad. Schm. 

 P, fontinale, C. Pfr. 

 E. parasitica, Parr. 

 18* 



