pagiiM 



B. Brochidium 52. 103 



4. maius 53 



5. cochleare 54 



6. parvulum 55 



V. Hydrodictyon 55 



1. utriculatum 62 



VI. Pediastrum 64 



Clavis specierum 77 



A. Monactinium 79 



1. simplex SO 



2. ovatum 81 



3. triangulum 81 



B. Anomopedium si 



4. integrum 81 



C. Diactinium S2 



5. niiiiii inn 82 



6. vagum 82 



7. Selenaea S3 



S. angulosum S4 



9. forcipatum 86 



1C). Boryanum 86 



p. granulatum 90 



11. bidentulum 91 



12. constrictum 91 



13. gracile 91 



I'l. pertusum 92 



/3. microporum 92 



y. clathratum 93 



recurvatum 93 



6. asperum 93 



<?. brachvlobum 93 



J 



D. Tetractinium 97 



15. Ehrenbergii 97 



16. caudatum 101 



17. tetraodon 101 



IS. Rotula 101 



p. eniarginatum 102 



