﻿MUSSELS 
  OF 
  CENTEAL 
  AND 
  NOETHEEN 
  MINNESOTA. 
  

  

  17 
  

  

  2. 
  WMle 
  the 
  shipping 
  facilities 
  do 
  not 
  warrant 
  artificial 
  propa- 
  

   gation 
  in 
  this 
  drainage, 
  such 
  exceptional 
  shells 
  should 
  not 
  be 
  

   allowed 
  entirely 
  to 
  disappear 
  before 
  an 
  earnest 
  effort 
  is 
  made 
  to 
  

   introduce 
  them 
  in 
  other 
  localities. 
  Here 
  is 
  a 
  peculiarly 
  fine 
  parent 
  

   stock 
  which 
  richly 
  deserves 
  protection 
  and 
  cultivation 
  as 
  a 
  source 
  

   from 
  whence 
  to 
  derive 
  propagation 
  material. 
  

  

  MUSSELS 
  OF 
  THE 
  MISSISSIPPI 
  GROUP. 
  

  

  As 
  would 
  be 
  expected, 
  tliis 
  is 
  much 
  the 
  largest 
  of 
  the 
  gi-oups 
  here 
  

   considered, 
  and 
  includes 
  all 
  of 
  the 
  Mississippi 
  River 
  above 
  the 
  mouth 
  

   of 
  the 
  Crow 
  Wing 
  River, 
  together 
  with 
  the 
  lakes 
  and 
  tributaries 
  

   connected 
  with 
  it. 
  This 
  portion 
  of 
  the 
  Mississippi 
  is 
  entirely 
  post- 
  

   glacial 
  and 
  has 
  been 
  formed 
  since 
  the 
  disappearance 
  of 
  the 
  glacial 
  

   lake 
  Nicollet. 
  

  

  It 
  drains 
  Crov/ 
  Wing 
  County, 
  the 
  northern 
  portions 
  of 
  Aitkin, 
  Cass, 
  

   and 
  Hubbard 
  Counties, 
  and 
  the 
  southern 
  portions 
  of 
  Itasca, 
  Beltrami, 
  

   and 
  Clearwater 
  Counties. 
  All 
  of 
  these 
  regions, 
  but 
  especially 
  Itasca 
  

   County, 
  contain 
  a 
  large 
  number 
  of 
  lakes, 
  some 
  of 
  which, 
  like 
  Leech, 
  

   Winnibigoshish, 
  and 
  Cass 
  Lakes, 
  are 
  among 
  the 
  largest 
  in 
  the 
  State. 
  

   This 
  region, 
  of 
  course, 
  has 
  been 
  in 
  constant 
  communication 
  with 
  the 
  

   Mississippi 
  since 
  the 
  very 
  beginning 
  and 
  hence 
  has 
  been 
  stocked 
  with 
  

   samples 
  of 
  all 
  the 
  mussels 
  found 
  in 
  that 
  river 
  above 
  the 
  Falls 
  of 
  

   St. 
  Anthony. 
  The 
  following 
  table 
  gives 
  the 
  geographic 
  distribution 
  

   of 
  these 
  mussels 
  : 
  

  

  Distribution 
  op 
  Mussels 
  in 
  the 
  Mississippi 
  Group. 
  

  

  The 
  poverty 
  of 
  specimens 
  at 
  Brainerd 
  is 
  explained 
  by 
  the 
  fact 
  that 
  

   we 
  could 
  only 
  examine 
  the 
  river 
  for 
  a 
  short 
  distance 
  above 
  and 
  

   below 
  the 
  city, 
  and 
  in 
  this 
  interval 
  we 
  did 
  not 
  find 
  any 
  mussel 
  bed. 
  

   Doubtless 
  there 
  are 
  as 
  many 
  mussels 
  in 
  this 
  portion 
  of 
  the 
  Mississippi 
  

   as 
  elsewhere. 
  

  

  