﻿BIHANG 
  TILL 
  K. 
  SV. 
  VET.-AKAD. 
  HANDL. 
  BAND 
  6. 
  N:0 
  21. 
  35 
  

  

  Gotland 
  : 
  Klintehamn, 
  In 
  the 
  Baltic, 
  form 
  sporang. 
  (Schum, 
  

   1867). 
  

  

  A. 
  rigida 
  K. 
  

  

  In 
  the 
  Baltic 
  (Schum. 
  1867). 
  

  

  Berkeleya 
  Geev. 
  

  

  B. 
  rutilans 
  (Trent.) 
  Geun. 
  

  

  var. 
  crinoidea 
  (Haev.) 
  Geun. 
  Botan. 
  Central-Blatt 
  "^Y^g 
  1880. 
  

   Gotland: 
  Slite 
  (Cl.). 
  

  

  B. 
  fennica 
  nov. 
  spec. 
  

   Pl. 
  II, 
  f. 
  19. 
  

  

  Little, 
  hyaline. 
  Valve 
  linear-lanceolate 
  with 
  rounded 
  

   ends. 
  Striae 
  inconspicnous. 
  Lengtli 
  0,017 
  mm., 
  breadth 
  oi' 
  

   the 
  valve 
  0,003 
  rara. 
  No 
  thallus 
  found. 
  

  

  Helsingrfors. 
  

  

  Brebissonia 
  Geun. 
  

  

  B. 
  Boeckii 
  Ehb. 
  

  

  Common 
  in 
  the 
  sonthern 
  part 
  of 
  the 
  Baltic, 
  less 
  common 
  

   on 
  the 
  coasts 
  of 
  Södermanland 
  and 
  Upland, 
  not 
  found 
  in 
  

   the 
  Gulf 
  of 
  Bothnia, 
  not 
  rare 
  in 
  the 
  Finnish 
  bay. 
  

  

  Fam. 
  MtzscMeee. 
  

   Nitzschia 
  Hass. 
  

  

  N. 
  punctata 
  (Sm.) 
  Geun. 
  

  

  Geun. 
  Aret. 
  Diat. 
  p. 
  68. 
  

  

  Malmö, 
  Upland: 
  Rådmansö, 
  Norrtelje. 
  Common 
  in 
  bot- 
  

   tomclay 
  and 
  in 
  silt 
  and 
  silty 
  clay 
  from 
  Upland, 
  in 
  blackclay 
  

   from 
  eastern 
  Sweden. 
  

  

  var. 
  elongata 
  Geun. 
  

  

  In 
  the 
  Baltic 
  (Aret. 
  Diat. 
  p. 
  Q^). 
  

  

  N. 
  7iavicularis 
  (Beéb.). 
  

  

  In 
  the 
  Baltic 
  (Schum. 
  1867). 
  

  

  N. 
  Tryhlionella 
  Hantsch. 
  

   Vaxholm 
  (Cl.), 
  Norrtelje. 
  

   v. 
  amhigua 
  Geun. 
  

   Aret. 
  Diat. 
  p. 
  69. 
  

   Helsingfors. 
  

  

  