— 64 — 



3. var. pisidiodes Gra}^ 



4. S. scaldianum Norm. 



5. S. ovale Fer. 



47. Gattung Calyculina Cless. 



1. C. lacustris Müll. 



1. var. mamillare Gass. 



2. var. steini A. Schm. 



2. C. brochonianum Bgt. 



3. C. creplini Dkr. 



4. C. rückholti Norm. 



48. Gattimg Pisidium C. Pfr. 



1. Gruppe Fluminina Cless. 



1. P. amnicum Müll. 



2. Gruppe Rivulina Cless. 



2. P. supimim A. Schm. 



3. Gruppe Fossarina Cless. 



3. P. henslowianum Shepp. 



4. P. pulchellum Jen. 



5. P. nitidum Jen. 



1. var. splendens Baud. 



6. P. fontinale C. Pfr. 



1. var, acuminatum Wstld. 



2. var. modestum Cless. ■ 



3. var. clessini v. Kimak. 



Form-Varietät. 

 1. var. major Cless. 



7. P. roseum Scholtz. 



8. P. ovatum Cless. 



9. P. intermedium Gass. 



10. P. obtusale C. Pfr. 



11. P. pusillum Gmel. 



12. P. subtruncatum Malm. 



13. P. milium Held. 



14. P. scholtzi Cless. 



17. Familie Mytilidae. 



49. Gattung Dreissensia Bened. Wandermusehel. 



1. Dreissensia polymorpha Pallas. 



