46 
Charles . Bessey— 
17. Oscillaria princeps Vauch. Lincoln, July, 1891, (W.) 
18. Lyngbya estuarii Liebm. Forming a reddish-brown coating upon the 
ground near Lincoln, the soil probably somewhat saline. April, 1892, 
(Bessey. ) 
19. Lsactis fluziatil’s (Rab.) Kirch. Minden, (H.) 
PALMELLACEZ. 
20. Protococcus frustulosus (Carm.) D, Ton. In the basin of the artesian 
well, Lincoln, Dec. 1891, (S ) 
21. Protococcus vestitus Reinsch. In material collected by Dr. Hapeman 
at Minden, (C.) 
22. Raphidium braunti Naeg. In material from Minden collected by Dr. 
Hapeman, (C.) 
22%. Raphidum polymorphum Fries. var, aciculare A. Br. Minden, (H.) 
23. Tetraspora lubrica (Roth.) Ag. Minden, Coll. Hapeman, (W.) 
CLADOPHORACE. 
24. Cladophora glomerata (L.) Kuetz., var. simplicior Kuetz. Minden, Coll. 
by Dr. Hapeman. (W.) ; 
25. Draparnaldia plumosa Ag. Wahoo, (R.) 
26. Draparnaldia glomerata (Vauch.) Ag. var. genuina Kirch. Ina pool. 
Lincoln, (W.) 
27. Chaetophora cornu-dama (Roth.) Ag. var. folyclados Kuetz, Minden, 
Coll. Hapeman, (W.) 
DESMIDIACEA. 
28. Desmidium aptogonium Breb. Minden, Coll. Hapeman, (C.) 
29. Closterium acerosum (Schr.) Ehrb. Lincoln, (C.) 
30. Closterium diane Ehrb. Lincoln, (C.) 
31. Closterium intermedium Ralfs. Minden, Coll. Hapeman, (C.) 
32. Closterium lanceolatum Kuetz. Lincoln, (W.) 
33. Cosmarium gotlandicum Wittr. Minden, Coll. Hapeman, (C.) 
34. Cosmarium botrytis Menegh. In material collected by Dr. Hapeman 
at Minden, (C.) 
35. Cosmarium portianum Arch. Minden, Coll. Hapeman, (C.) 
36. Luastrum pokornyanum Grun. In material collected at Minden by Dr. 
Hapeman, (C.) 
37. Staurastrum dickiet Ralfs. In material collected at Minden py Dr. 
Hapemam, (C.) 
38. Staurastrum eustephanum (Ebr?) Ralfs. In material collected at Min- 
den by Dr. Hapeman, (C.) 
39. Staurastrum quadrangulare Breb. In material collected at Minden by 
Dr. Hapeman, (C.) 
DIATOMACES. 
40. Stauronets lineata Kg. Agrees with Wolle’s figure, but no description 
1s accessible. In material from Minden, collected by Dr. Hape- 
man, (C.) 
41. Stauroneis phanicenteron (Nitzsch.) Ehr. Lincoln, (C.) 
42. Navicula formosa Greg. Lincoln, (C.) 
43. Navicula hemiptera Kg. Crete, (C.) 
44. 
Navicula mutica Kg. Lincoln, (C.) 
