﻿16 
  JUHLIN-DANNFELT, 
  ON 
  THE 
  DIATOMS 
  OF 
  THE 
  BALTIC 
  SEA. 
  

  

  somewhat 
  radiating. 
  I 
  refer 
  them 
  botli 
  to 
  M. 
  lanceolata 
  

   Thw., 
  because 
  this 
  species 
  lives 
  in 
  salt 
  water 
  and 
  because 
  

   Geunow 
  and 
  Cleve 
  ^) 
  have 
  enumerated 
  this 
  species 
  but 
  not 
  

   M. 
  Smithii 
  as 
  occurring 
  in 
  tlie 
  Baltic. 
  Tlie 
  form, 
  given 
  in 
  

   Cl. 
  & 
  Moll. 
  Diat. 
  Nio 
  86 
  as 
  M. 
  Smithii 
  Thw., 
  belongs 
  to 
  

   ray 
  var. 
  amphicephala. 
  The 
  two 
  forms, 
  that 
  I 
  have 
  found 
  

   in 
  the 
  Baltic, 
  are: 
  

  

  var. 
  elliptica. 
  

  

  VH. 
  D. 
  B. 
  Plate 
  IV, 
  figs. 
  16, 
  17. 
  

  

  Common 
  in 
  all 
  parts 
  of 
  the 
  Baltic. 
  Plate 
  I, 
  fig. 
  2 
  a. 
  

  

  var. 
  amjjhicepJiala. 
  

  

  Plate 
  I, 
  fig. 
  2 
  b. 
  

  

  Still 
  more 
  common 
  than 
  the 
  previous 
  var. 
  

  

  M. 
  exigua 
  Lewis. 
  

   VH. 
  D. 
  B. 
  Pl. 
  IV, 
  figs 
  25, 
  26. 
  

  

  Not 
  common: 
  Gotl.: 
  Ostergarn 
  (Cleve), 
  Klintehamn, 
  Abo, 
  

   Helsingfors, 
  Travemllnde, 
  Oland: 
  Mörbylånga, 
  Vestervik. 
  

  

  M. 
  Dansei 
  Thw. 
  

  

  VH. 
  D. 
  B. 
  Pl. 
  IV, 
  fig. 
  18. 
  

  

  Käre: 
  Gotland: 
  Tjeldervik 
  (Cleve), 
  Klintehamn. 
  

  

  var. 
  elliptica 
  (C. 
  Ag.). 
  

  

  VH. 
  D. 
  B. 
  Pl. 
  IV,^ 
  fig. 
  19. 
  

  

  As 
  I 
  am 
  not 
  quite 
  sure 
  that 
  the 
  form 
  occurring 
  in 
  the 
  

   Baltic 
  is 
  that 
  one 
  named 
  by 
  Ag., 
  I 
  give 
  a 
  figure 
  of 
  it 
  in 
  

   Pl. 
  I, 
  fig. 
  3. 
  

  

  Rather 
  common: 
  Malmö, 
  Karlshamn, 
  Oland: 
  Mörbylånga, 
  

   Gotland 
  : 
  Ostergarn 
  (Cleve), 
  Kalmar, 
  Vestervik, 
  Oskarshamn, 
  

   Oxelösund, 
  Roslagen, 
  Abo. 
  Found 
  in 
  the 
  deep 
  Norrtelje 
  bay 
  

   in 
  almost 
  fresh 
  water, 
  but 
  not 
  noticed 
  in 
  the 
  Gulf 
  of 
  Bothnia. 
  

  

  M. 
  Braunii 
  Grtjn. 
  

  

  VH. 
  D. 
  B. 
  Pl. 
  IV, 
  figs 
  21, 
  22. 
  

  

  Pl. 
  I, 
  fig. 
  4. 
  

  

  Not 
  rare: 
  Malmö, 
  Sölvesborg, 
  Kalmar, 
  Oland: 
  Mörby- 
  

   långa, 
  Gotland: 
  Ostergarn 
  (Cleve), 
  Oxelösund, 
  Roslagen 
  in 
  

   brackish 
  water. 
  Norrtelje 
  in 
  almost 
  fresh 
  water. 
  

  

  var. 
  pimiila 
  Grun. 
  

  

  VH. 
  D. 
  B. 
  Pl. 
  IV, 
  fig. 
  23. 
  

  

  Rather 
  rare: 
  Sölvesborg, 
  Travemiinde, 
  Gotland: 
  Öster- 
  

   garn. 
  Furusund, 
  Abo. 
  

   ') 
  Cl, 
  Sv. 
  o. 
  N. 
  Diat. 
  p. 
  230. 
  

  

  