10 H. J. Webber — 



19. COSMARIUM Corda. 



21. C. broomki Thwaites. In material from Minden, collected by 

 Dr. Hapeman Oct. 19 (Woods). 



20. XANTHIDIUM Ehrb. 



22. X. fasciculatum (Ehrb.) Ralfs. la material from Minden, col- 

 lected by Dr. Hapeman (Woods). 



21. ARTHRODESMUS Ehrb. 



23. A. octocornis Ehrb. In material from Minden, collected by Dr. 

 Hapeman (Woods). 



22. EUASTRUM Ehrb. 



24. E. inermb Lund. In material from Minden, collected by Dr. 

 Hapeman (Woods). 



23. MICRASTERIAS Ag. 



25. M. Americana (Ehrb.) Kg. Minden, in material collected by Dr. 

 Hapeman (Wood:*). 



26. M. speciosa Wolle. Minden. In material collected by Dr. Hape- 

 man (Woods). 



24. STAURASTRUM Meyen. 



27. S. aristiferum Ralfs. Minden. In material collected by Dr. 

 Hapeman (Woods) . 



11. DIATOMACE.E. 



25. GOMPHONEMA. 



28. G. acuminatum Ehrb. var. laticeps Ehrb. Minden. In ma- 

 terial collected by Dr. Hapeman. (Bessey). 



12. ENTOMOPHTHORACE^E. 



26. EMPUSACohn. 



29. E. aphidis Hoffman. On Aphis Sp. on Polygonum. Ashland. 

 Oct. (Williams). 



OOPHYTA. 



13. CEDOGONIACE^E. 



27.'(EDOGONIUM Lk. 



30. (E. borisianum (Le CI.) Wittr. In material from Minden col- 

 lected by Dr. Hapeman (Woods). 



31. GE. delicatum Kg. Minden. In material collected by Dr. Hape- 

 man (Bessey) . 



28. BULBOCH^TE Ag. 



32. B. polyandra. Cleve. Minden. In material collected by Dr. 

 Hapeman (Bessey). 



