﻿MUSSELS 
  OF 
  CENTRAL 
  AND 
  NORTHERN 
  MINNESOTA. 
  23 
  

  

  and 
  would 
  furnish 
  sufficient 
  hosts 
  for 
  the 
  glochidia 
  ; 
  therefore, 
  in 
  case 
  

   the 
  artificial 
  stocking 
  of 
  lakes 
  proves 
  a 
  success, 
  three 
  of 
  these 
  lakes 
  

   present 
  good 
  opportunities 
  for 
  work 
  on 
  commercial 
  species. 
  

  

  SAUK 
  LAKE 
  AND 
  SAUK 
  RIVER. 
  

  

  Sauk 
  Lake, 
  3 
  miles 
  above 
  Sauk 
  Center 
  in 
  Stearns 
  County, 
  is 
  7 
  

   miles 
  long 
  and 
  f 
  mile 
  wide, 
  and 
  is 
  thus 
  little 
  more 
  than 
  a 
  widening 
  of 
  

   the 
  river. 
  It 
  is 
  partly 
  natural 
  and 
  partly 
  artificial, 
  produced 
  by 
  a 
  

   dam 
  across 
  the 
  river 
  at 
  Sauk 
  Center. 
  The 
  bottom 
  is 
  composed 
  of 
  

   sand 
  and 
  coarse 
  gravel, 
  covered 
  with 
  a 
  profuse 
  growth 
  of 
  algae, 
  

   Cliara, 
  Potomageton, 
  and 
  other 
  aquatic 
  vegetation. 
  The 
  only 
  mus- 
  

   sels 
  found 
  in 
  the 
  lake 
  were 
  the 
  fat 
  mucket 
  (luteola), 
  Anodontoides 
  

   ferussacianus 
  modestus 
  and 
  Anodonta 
  pepiniana. 
  The 
  muckets 
  are 
  

   thin-shelled, 
  dwarfed, 
  and 
  covered 
  with 
  a 
  large 
  amount 
  of 
  marl 
  pos- 
  

   teriorly. 
  The 
  epidermis 
  is 
  honey-yellow 
  in 
  color, 
  highly 
  pohshed, 
  

   and 
  faintly 
  rayed. 
  The 
  two 
  floaters, 
  of 
  course, 
  possess 
  no 
  commercial 
  

   value, 
  and 
  were 
  found 
  only 
  in 
  limited 
  numbers. 
  

  

  The 
  river 
  was 
  examined 
  below 
  the 
  mill 
  dam 
  at 
  Sauk 
  Center, 
  and 
  

   again 
  3 
  miles 
  above 
  St. 
  Cloud. 
  The 
  fat 
  mucket 
  (luteola), 
  the 
  pocket- 
  

   book 
  (ventricosa) 
  , 
  and 
  the 
  black 
  sand-shell 
  (recta) 
  were 
  found 
  in 
  abun- 
  

   dance 
  at 
  both 
  places, 
  and 
  in 
  addition 
  near 
  St. 
  Cloud 
  there 
  were 
  some 
  

   ordinar}^ 
  muckets 
  (ligamentina) 
  and 
  Anodontoides. 
  

  

  The 
  fat 
  muckets 
  were 
  of 
  river 
  size, 
  and 
  a 
  small 
  percentage 
  were 
  

   thick 
  enough 
  for 
  buttons, 
  the 
  ordinary 
  muckets 
  were 
  of 
  large 
  size 
  

   and 
  thick-shelled, 
  but 
  were 
  somewhat 
  spotted 
  ; 
  the 
  pocketbooks 
  were 
  

   exceptionally 
  large, 
  much 
  flatter 
  than 
  usual, 
  thick, 
  and 
  with 
  a 
  good 
  

   luster, 
  but 
  they 
  were 
  also 
  spotted, 
  and 
  on 
  being 
  tested 
  proved 
  to 
  be 
  

   brittle, 
  thus 
  rendering 
  practically 
  worthless 
  material 
  that 
  to 
  all 
  

   appearance 
  seemed 
  to 
  be 
  as 
  good 
  as 
  that 
  from 
  the 
  Shell 
  River 
  at 
  

   Menahga. 
  The 
  only 
  thing 
  worthy 
  of 
  comment 
  here 
  is 
  the 
  lack 
  of 
  a 
  

   suitable 
  fishway 
  around 
  the 
  dam 
  at 
  Sauk 
  Center. 
  The 
  effect 
  of 
  this 
  

   is 
  seen 
  in 
  the 
  fact 
  that 
  although 
  the 
  pocketbook 
  was 
  common 
  just 
  

   below 
  the 
  dam, 
  not 
  one 
  could 
  be 
  found 
  in 
  the 
  3 
  miles 
  of 
  river 
  above 
  

   the 
  dam. 
  

  

  LAKE 
  MINNEWASKA, 
  LAKE 
  OSAKIS, 
  AND 
  BATTLE 
  LAKE. 
  * 
  

  

  Lake 
  Minnewaska, 
  situated 
  at 
  Glenwood, 
  near 
  the 
  center 
  of 
  Pope 
  

   County, 
  is 
  8 
  miles 
  long 
  and 
  2 
  miles 
  wide. 
  The 
  bottom 
  is 
  of 
  sand 
  

   and 
  rather 
  fine 
  gravel, 
  with 
  numerous 
  shallow 
  sand 
  bars 
  along 
  the 
  

   southwestern 
  shore. 
  The 
  average 
  depth 
  of 
  the 
  water 
  is 
  from 
  12 
  to 
  

   15 
  feet, 
  and 
  while 
  there 
  is 
  an 
  interrupted 
  fringe 
  of 
  rushes 
  along 
  the 
  

   shore 
  line 
  the 
  lake 
  itself 
  is 
  exceptionally 
  clear 
  and 
  free 
  from 
  aquatic 
  

   vegetation. 
  There 
  is 
  no 
  outlet 
  except 
  during 
  very 
  high 
  water, 
  when 
  

   a 
  small 
  stream 
  overflows 
  into 
  the 
  Chippewa 
  River, 
  which 
  is 
  a 
  tribu- 
  

   tary 
  of 
  the 
  Minnesota 
  River. 
  

  

  