﻿36 
  JUHLIN-DANNFELT, 
  ON 
  THE 
  DIATOMS 
  OF 
  THE 
  BALTIC 
  SEA. 
  

  

  V. 
  Levidensis 
  (Sm.) 
  Grun. 
  

  

  Aret. 
  Diat. 
  p. 
  70. 
  VH. 
  D. 
  B. 
  Pl. 
  LVII, 
  fig. 
  15. 
  

   Very 
  often 
  constricted 
  in 
  tlie 
  middle. 
  Striae 
  12 
  — 
  14, 
  — 
  

   denser 
  than 
  is 
  stated 
  in 
  Getjn. 
  Aret. 
  Diat. 
  

  

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

  

  N. 
  angustata 
  Sm. 
  

   Grun. 
  Aret. 
  Diat. 
  p. 
  70. 
  

  

  Fresliwater 
  speeies, 
  sparinglj 
  oceurring 
  in 
  scareely 
  braek- 
  

   ish 
  water. 
  

  

  Rathan 
  (Cl.). 
  

  

  Tryhlionella 
  Neptuni 
  ScHUM. 
  

   SCHTJM. 
  1867, 
  pl. 
  I, 
  fig. 
  11. 
  

  

  I 
  have 
  not 
  been 
  able 
  to 
  identify 
  tliis 
  speeies 
  witli 
  any 
  

   otlier 
  one 
  known 
  to 
  me. 
  

  

  In 
  tlie 
  Baltic 
  (Schum. 
  1867). 
  

  

  N. 
  Panduriformis 
  Greg. 
  

  

  In 
  the 
  Baltie 
  (Schum. 
  1867). 
  

  

  N. 
  plana 
  Sm. 
  

  

  In 
  the 
  Baltic 
  (Scum. 
  1867). 
  

  

  N. 
  constricta 
  Greg. 
  

  

  In 
  the 
  Baltic 
  (Schum. 
  1867). 
  

  

  iV. 
  marginatida 
  Grun. 
  v. 
  genuina. 
  

  

  In 
  the 
  Baltic 
  (Grun. 
  Aret. 
  Diat. 
  pag. 
  72). 
  

  

  N. 
  hungarica 
  Grun. 
  

   VH. 
  D. 
  B. 
  Pl. 
  LVIII, 
  f. 
  20. 
  

  

  Harbour 
  of 
  Travemlinde 
  (Ostsee 
  Exp. 
  1871, 
  p. 
  177), 
  

   Malmö, 
  Vaxholm 
  (Cl.), 
  Gotland: 
  Klintehamn, 
  Helsingfors. 
  

  

  N. 
  apicidata 
  (Greg.) 
  Grun. 
  

  

  VH. 
  D. 
  B. 
  Pl. 
  LVIII, 
  fig. 
  26, 
  27. 
  Aret. 
  Diat. 
  p. 
  73. 
  

   Travemlinde, 
  Gotland: 
  Slite 
  (Cl.), 
  Upland: 
  Blidö, 
  Hel- 
  

   singfors. 
  

  

  N. 
  acuniinata 
  Sm. 
  

  

  Harbour 
  of 
  Pillau 
  (Schum. 
  1867). 
  

  

  N. 
  litoralis 
  Grun. 
  Aret. 
  Diat. 
  p. 
  75. 
  

  

  Helsingfors. 
  

  

  v. 
  Tergestina 
  Grun. 
  

  

  Aret. 
  Diat. 
  p. 
  75. 
  

  

  Södermanland: 
  Härinee. 
  

  

  