﻿BIHANG 
  TILL 
  K. 
  SV. 
  VET.-AKAD. 
  HANDL. 
  BAND. 
  6. 
  N:0 
  21. 
  41 
  

  

  Campylodisciis 
  E. 
  

  

  C. 
  Echineis 
  E. 
  

  

  In 
  brackish 
  and 
  in 
  almost 
  fresli 
  water: 
  Harbour 
  of 
  Travc- 
  

   miinde 
  (Ostsee 
  Exp. 
  1871, 
  p. 
  177), 
  Vaxholm 
  (Cl.), 
  Södertelje 
  

   (Cl.), 
  Upland: 
  Eådmansö. 
  

  

  Subfoss. 
  : 
  constantly 
  found 
  in 
  the 
  black-clays 
  of 
  eastern 
  

   Sweden, 
  in 
  the 
  silt 
  and 
  silty 
  clay 
  from 
  Roslagen, 
  in 
  the 
  diat. 
  

   deposit 
  near 
  Christianstad. 
  

  

  C. 
  Clyjyeus 
  E. 
  

  

  Occurs 
  as 
  the 
  former. 
  Sölvesborg, 
  Gotland: 
  Slite 
  and 
  

   Bogevik 
  (Cl.), 
  Södertelje, 
  Upland: 
  Rädmansö. 
  

  

  Subfoss.: 
  as 
  the 
  former, 
  but 
  still 
  more 
  common. 
  

  

  Besides 
  these 
  Schumaisin 
  mentions 
  as 
  Baltic 
  species: 
  

   C. 
  parvuliis 
  Sm. 
  

   C. 
  Hodgsonii 
  Sm. 
  

   (7. 
  Stelhda 
  ScHUM. 
  

  

  Fam. 
  Synedrese. 
  

  

  Synedra 
  Ehb. 
  

  

  S. 
  radians 
  K. 
  

  

  VH. 
  D. 
  B. 
  Pl. 
  XXXIX, 
  fig. 
  11. 
  

  

  Travemiinde 
  (Ostsee 
  Exp. 
  1871, 
  p. 
  177), 
  Upland: 
  Blidö. 
  

  

  S. 
  Ulna 
  v. 
  obtusa 
  Sm. 
  

  

  VH. 
  D. 
  B. 
  Pl. 
  XXXVIII, 
  f. 
  6. 
  

  

  Harbour 
  of 
  Visby. 
  Length 
  0,175, 
  breadth 
  0,0085 
  mm., 
  

   striae 
  12 
  in 
  0,01 
  mm. 
  

   v. 
  splendens 
  K. 
  

   Gotland: 
  Slitc 
  (Cl.), 
  Xorrtelje, 
  Rathan 
  (Cl.). 
  

  

  S. 
  delicatissima 
  Sm. 
  

  

  VH. 
  D. 
  B. 
  Pl. 
  XXXIX, 
  f. 
  7. 
  

  

  Gotland: 
  Slite 
  (Cl.), 
  Rathan 
  (Cl.). 
  

  

  S. 
  pidchella 
  K. 
  

  

  This 
  variable 
  species 
  is 
  very 
  common 
  in 
  all 
  parts 
  of 
  the 
  

   Baltic 
  from 
  the 
  Sound 
  to 
  the 
  northern 
  joart 
  of 
  the 
  Gulf 
  of 
  

   Bothnia 
  and 
  in 
  the 
  Finnish 
  bay. 
  

  

  v. 
  genuina. 
  

  

  VH. 
  D. 
  B. 
  Pl. 
  XLI, 
  fig. 
  1. 
  

  

  Very 
  common. 
  

  

  