﻿28 
  JUHLIN-UANNFELT, 
  ON 
  THE 
  DlATOMS 
  OF 
  THE 
  BALTIC 
  SEA. 
  

  

  tained 
  as 
  separate 
  species, 
  the 
  striae 
  seem 
  to 
  ruu 
  in 
  a 
  double 
  

   bow, 
  and 
  those 
  at 
  the 
  extremities 
  appear 
  running 
  in 
  a 
  direc- 
  

   tion 
  opposite 
  those 
  nearer 
  the 
  middle 
  of 
  the 
  valve. 
  Striae 
  

   16 
  — 
  17 
  in 
  0,01 
  mm. 
  in 
  all 
  these 
  three 
  forms, 
  thiis 
  denser 
  as 
  

   in 
  the 
  fig:s 
  in 
  VH. 
  D. 
  B. 
  

  

  var. 
  subsalina 
  DoNK. 
  

   VH. 
  D. 
  B. 
  Pl. 
  XI, 
  fig. 
  7. 
  

  

  Helsingfors, 
  Norrtelje, 
  Gotland: 
  Klinteharan, 
  Kalmar. 
  The 
  

   fig. 
  14, 
  Plate 
  II 
  shows 
  a 
  broad 
  from 
  passing 
  into 
  the 
  next. 
  

  

  var. 
  Fenzlii 
  Geun. 
  

  

  VH. 
  D. 
  B. 
  PL 
  XI, 
  fig. 
  5. 
  

  

  Rathan 
  (Cl.), 
  Helsingfors, 
  Gotland: 
  Klintehamn. 
  

  

  N. 
  Hohniensis 
  Cl. 
  

  

  Cl. 
  New 
  Diat. 
  p. 
  8, 
  Pl. 
  II, 
  fig. 
  18. 
  

  

  In 
  slightly 
  brackish 
  water 
  at 
  Vaxholm 
  (Cl.). 
  

  

  N. 
  ovulum 
  Grun. 
  

  

  In 
  the 
  Baltic 
  (Schum. 
  1867). 
  

  

  N. 
  crucicula 
  (Sm.) 
  Donk. 
  f. 
  minor. 
  

   VH. 
  D. 
  B. 
  Pl. 
  X, 
  fig. 
  15. 
  

  

  In 
  the 
  slightly 
  brackish 
  water 
  of 
  Bråviken 
  and 
  at 
  Vax- 
  

   holm 
  (Cl.). 
  

  

  N. 
  cTucifera 
  Grun. 
  

  

  In 
  the 
  Baltic 
  (Schm. 
  Atl. 
  Pl. 
  46, 
  fig. 
  50). 
  

  

  N. 
  direkta 
  (Sm.). 
  

  

  Pinnularia 
  Sm. 
  Syn. 
  Pl. 
  XVIII, 
  fig. 
  172. 
  

  

  Kiel 
  (Schm. 
  Atl. 
  Pl. 
  47, 
  fig. 
  5), 
  Karlshamn. 
  

  

  N. 
  distans 
  Sm. 
  

  

  Harborir 
  of 
  Travemilnde 
  (Ostsee 
  Exp. 
  1871, 
  p. 
  177). 
  

  

  N. 
  Cluthensis 
  Greg. 
  

  

  Subfossil: 
  Upland: 
  in 
  silt 
  from 
  Rådmansö. 
  

  

  N. 
  pusilla 
  W. 
  Sm. 
  

  

  VH. 
  D. 
  B. 
  Pl. 
  XI, 
  f. 
  17. 
  

  

  In 
  the 
  Baltic 
  (Schum. 
  1867), 
  Gotland: 
  Klintehamn. 
  

  

  N. 
  punctata 
  Donk. 
  

  

  Gotland: 
  Ostergarn 
  (Cl.), 
  Vaxholm 
  (Cl.), 
  Rathan 
  (Cl.), 
  

   Haparanda 
  (Cl.). 
  

  

  