BIHANG TILL K. SV. VET.-AKAD. HANDL. BAND 21. AFD. III. N:0 2. 41 



vvith fresh water the basin of the Baltic sea and covered parts 

 of Sweden. The lists of diatoms found in Ancylus-deposits 

 and published in the works mentioned below ^ by Munthe, 

 Nathorst and Holst aniount altogether to 75 species and 

 varieties, gathered in Lärbro (Grotland) Heby, Skattmansö 

 (Upland) Ryssby (Småland) and Viborg (Finland). In this 

 number are not included the forms found in Ancyliis-deposits 

 from Norrland and published in Gr. Andersson: »Om senglaciala 

 o(!h postglaciala aflagringar i mellersta Norrland (Geol. Fören. 

 i Stockholm förhandl. n:r 161, Bd. 16, h. 7), becavise a great 

 number of them have certainly been earried by streams, coming 

 from high parts of the country, and thus do not properly 

 belong to the flora of the Ancylus-sea. 



Of those 75 forms, the following are frequent in and 

 characteristic of the Ancylus-sea. Those which are rare in 

 Lule Lappmark are marked r and those entirely absent o. 



r. Navicula tuscula Ehb. 



o. Caloneis latiuscula Kutz. 



o. Pleurosigma attennatum W. Sm. 



r. Diploneis dombUttensis Grun. 



r. elliptica Kutz. 



o. Cocconcis Pediculns Ehb. 



Cymhella aspera Ehb. {gastroides Kutz.) 

 o. Ehrenhergii Kutz. 



r. lanceolata Ehb. 



o. Cgmbella prostrata (Ralfs). 



Gomplionema geminatum Ag. 



o. Ämphora ovalis Kutz. 



o. Surirella spiralis Kutz. 



o. Cymatopleura elliptica W. Sm. 



o. Campylodiscus hihernicus Ehb. 

 o. noricus Ehb. 



o. Epithemia turgida Kutz. 

 o. Hyndmanii W. Sm. 



^ Munthe: Uber die sogenannte »Undre grålera» nnd einige darin ge- 

 fundene fossilien. Bull. of the geolog. Instit. of Upsala 1894. 



Nathorst: Om en fossilföraude leraflagring vid Skattmansö i Upland. 

 (jreol. Fören. i Stockholm förhandl. N:r 154, Bd 15, H. 7. 



Nathorst: En växtförande lera från Viborg i Finland. Geol Fören i 

 Stockholm förhandl. N:r 158, Bd 16, H. 4. 



Holst: Om ett fvnd af uroxe i Råknebj', Ryssby socken, Kalmar län. 

 Geol Fören. i Stockholm förhandl. Bd 10, H. 7. 



