24 



P. T. CLEVE, DIATOMS FROM FRANZ JOSEF LAND. 



TT. Diatoms in iiiiul, gatliered on a floe of drifting; ice 

 48 miles South of Bell Isle. 



This very small sample was subjected to a careful clean- 

 ing and yielded an nnexpected nuniber of species, both marine, 

 freshwater and l)rackish forms, viz. 



A. Freshwater-forms. 



Amphora ovalis var. pediculus Kutz. r 

 Caloneis silicula var. ventricosa Donk. r 

 Cocconeis placentula var. euglypta Ehb. r 

 Cyelotella eonita var. radiosa Kutz. r 

 Cyclotella Meneghiniana Ktixz. + 

 Eunotia inoisa (tREö. r 



E. praerupta var. curta Grun. r 

 Fragilaria construens Ehb. r 



F. mutabilis Grun. r 



F. vireseens TIalfs. r 

 Gomphonema aeuminatum Ehb. r 



G. snbclavatum Grun. r 



Hantzschia amphioxys var. xeropliila Grun. r ' 



Melosira crenulata var. lineolata Grun. c 



var. tennis Kutz. r 



M. grannlata var. jonesiana Grun. + 



Navicnla dicepliala Ehb. t 



N. psendo-bacillnm Grun. r 



N. pnpnla v. bacillaroides Grun. r 



N. radiosa KiJTZ. r 



Neidium bisnlcatnm Ldt. r 



Nitzscbia ampbilna Grun., typical. r 



N. (Tryblionella) Victorise Grun. r 



Pinnnlaria acrosphwria Bréb. f. minor, r 



P. viridis var. conimntata Grun. t 



Stephanodiscus minutnhis Grun. r 



Synedra ulna Ehb., a fragment. 



B. Brackish-water-forms. 



Diploneis Smithii Bréb. r 



Navicnla anglica var. subsalina Grun. r 



