﻿BIHAKG 
  TILL 
  K. 
  SV. 
  VET.-AKAD. 
  HANDL. 
  BAND 
  6. 
  N:0 
  21. 
  31 
  

  

  Eare. 
  Upland: 
  Blidö. 
  

  

  Subfossil: 
  Upland: 
  silt 
  from 
  Möja. 
  

  

  A"", 
  fusiformis 
  Grun. 
  v. 
  Ostrearia. 
  

   Amphipleura 
  danica 
  (K.) 
  Turp. 
  

   In 
  the 
  Baltic 
  (Schum. 
  1867). 
  

  

  ScHUMANN^ 
  in 
  his 
  list 
  of 
  Prussian 
  Diatoms, 
  1867, 
  mentions 
  

   the 
  following, 
  to 
  mc 
  quite 
  unknown 
  species, 
  as 
  occurring 
  in 
  

   the 
  Baltic: 
  

  

  N. 
  7nacrocephala 
  Schum. 
  

  

  iV. 
  Sambiensis 
  ScHUM. 
  

  

  N. 
  Granum 
  Avence 
  ScHUM. 
  

  

  JV. 
  italica 
  K. 
  

  

  N. 
  Ceres 
  Schum. 
  

  

  N. 
  Puella 
  Schum. 
  

  

  N. 
  Trunculus 
  Schum. 
  

  

  N'. 
  aperta 
  Schum. 
  

  

  A^. 
  candida 
  Schum. 
  possibly 
  = 
  N. 
  hungarica 
  Grun. 
  

  

  CoUetonema 
  Bréb. 
  

  

  C. 
  suhcolicerens 
  Sm. 
  

  

  Fresh 
  water 
  species, 
  found 
  in 
  the 
  Gulf 
  of 
  Bothuia 
  at 
  

   Eathan 
  (Cl.) 
  and 
  Hernösand 
  (Cl.). 
  

  

  Schizonema 
  Ag. 
  

  

  ? 
  Sch. 
  parvum 
  Menegh. 
  

  

  VH. 
  D. 
  B. 
  Pl. 
  XV, 
  fig. 
  30, 
  Plate 
  II, 
  fig. 
  17. 
  

  

  Frustules 
  withoLit 
  order 
  crowded 
  in 
  the 
  tube. 
  Valve 
  

   broadly 
  lanceolate, 
  striae 
  conspicuous 
  (punctate?), 
  in 
  the 
  

   middle 
  much, 
  at 
  the 
  ends 
  slightly 
  radiating. 
  Side 
  view 
  

   rectangular 
  with 
  obtuse 
  angles. 
  

  

  I 
  have 
  not 
  been 
  able 
  to 
  determine 
  this 
  form 
  surely, 
  but 
  

   it 
  seems 
  to 
  be 
  very 
  like 
  the 
  quoted 
  fig. 
  in 
  VH. 
  D. 
  B. 
  

  

  Rare: 
  Vestervik. 
  

  

  Sch. 
  Smithii 
  C. 
  Ag. 
  

  

  VH. 
  D. 
  B. 
  Pl. 
  XV, 
  fig. 
  33, 
  Pl. 
  H, 
  fig. 
  16. 
  

  

  Frustules 
  arranged 
  in 
  a 
  siugle 
  row, 
  with 
  the 
  ends 
  reaching 
  

   a 
  little 
  at 
  the 
  side 
  of 
  one 
  another. 
  Valve 
  linear-lanceolate, 
  

   gradually 
  tapering 
  towards 
  the 
  rounded 
  ends. 
  Striae 
  radiate 
  

   in 
  the 
  middle, 
  divergent 
  at 
  the 
  ends, 
  leaving 
  a 
  little 
  unstriated 
  

  

  