A. Grunow: Ueber Diatomaceen. 
8 a, b. Navicula nicobarica Grunow. 
9. Navieula pusilla W. Smith var. ? 
0. —  brasiliensis Grunow. 
11 a, b. Podosphenia Pappeana Grunow. 
12. Navicula Jelinecki Grunow. ; 
13. Chaetoceros Lorenzianus Grunow. 
14 a, b, c. Navicula Auklandica Gruno w. 
15. Navieula tahitensis Gruno w. 
16. —  Kamorthensis Grunow. 
17. Climacosphenia moniligera Ehrbg. 
18 a, b, c, Asterionella Frauenfeldii Grunow. 
19 a, b, c, d. Euodia Frauenfeldii Grunow. 
