Liter atur-öf versigt. 
121 
26. 
27. 
28. 
29. 
30. 
31. 
32. 
33 . 
dion circulare Ag. and less frequent: Navicula Bacillum Ehrb. 
N. (Stauroneis) punctata Kütz., Amphora ovalis Kütz. — Exam, 
by Grunow. 
Navicula ( Stauroptera ) aspera Ehrb. var. intermedia Grun. 
Sm. Atl. Spitsbergen. Coll, by R. F. Kjellman. 
Stauroneis amplior oides G run. Sm. Atl. Sweden, Malmö, brackish 
water. Coll, by O. Nordstedt. Exam, by Grunow. 
Cymbella heteropleura (Ehrb.) Sm. Atl. Luleå Lappmark, Mud. 
des Ape, fossil. Coll, by F. W. Svenonius. — Other forms. 
Eunotia robusta Ralfs v. tetraodon, E. prærupta Ehrb , E. (den¬ 
ticulata Bréb.) v. glabrata Grun., Navicula serians Kütz., N. vi¬ 
ridis Nitzsch, N. Dactylus Ehrb., Stauroneis Phoenicenteron. 
Ehrb. var., and less frequent: Eunotia pentaglyphis Ehrb., E. 
major. — Exam, by Grunow. 
Cymbella amphicephala Nægeli. Holstein, Wedel. Coll, by I. 
D. Möller. 
Cocconema Kamtschaticum Grun. Sm Atl. Kamtschatka Comm, 
by I. D. Möller. — Other forms: Synedra (splendens v.) aequa¬ 
lis Kütz., Encyonema Lunula (Ehrb.) Grun., Gomphonema ven- 
tricosum Greg, G. robustum Grun., Melosira (crenulata Ehrb. 
var.?) Kamtschatica Grun., Staurosira bidens (Heib.) Grun., 
Cyclotella operculata Kütz, Eunotia bigibba Kütz, Navicula no- 
dulosa Kütz etc. Exam, by Grunow. 
Cocconema Cistula Hempr. Sm. Atl. Sweden, Steneby in Dais- 
land. Coll, by Y. B. Wittrock. — Other forms: C. cymbiforme 
Kütz. var. Synedra (splendens var.) danica Kütz., Tabellaria fe¬ 
nestrata Kütz., Achnanthidium flexellum Bréb., Cocconeis Pla- 
centula Ehrb. Encyonema cæspitosum Kütz., Gomphonema con¬ 
strictum Ehrb., G. acuminatum Ehrb. and var. trigonocephalum 
Ehrb., G. intricatum Kütz., Navicula radiosa Kütz., N. commu¬ 
tata Grun., Cyclotella operculata Kütz., Melosira nivalis W. Sm. 
— Exam, by Grnnow. 
Cymbella gastroides Kütz. Sweden, Upsala. Coll, by P. T. 
Cleve. — Other forms : Campylodiscus spiralis Kütz., Cymato- 
pleura elliptica Bréb., Epithemia Zebra Ehrb., Amphora ovalis 
Kütz, Navicula viridis Nitzs., N. (viridis var ,) commutata Grun. 
N. oblonga Kütz. — Exam, by Grunow. 
Cymbella delicatula Kütz. Norway, Brewig, on moist rocks. Coll, 
by P. T. Cleve. Other forms: Cocconema parvum Sm. var. (see. 
35), Grunowia sinuata Rabh., Eunotia Arcus Ehrb. var. — Exam, 
by Grunow. 
