﻿E. 
  S. 
  Morse 
  — 
  Fossil 
  Shells 
  in 
  Boston 
  Basin. 
  159 
  

  

  effectually 
  prevented 
  from 
  intermingling 
  by 
  the 
  Cape, 
  and 
  do 
  

   not 
  pass 
  from 
  one 
  side 
  to 
  the 
  other. 
  No 
  specimen 
  of 
  Cochlo- 
  

   desma, 
  Mont 
  acuta, 
  Cumingia, 
  Corbula, 
  Janthina, 
  Tornatella, 
  

   Vermetus, 
  Columbella, 
  Cerithium, 
  Pyrula, 
  or 
  Ranella, 
  has 
  as 
  yet 
  

   been 
  found 
  to 
  the 
  north 
  of 
  Cape 
  Cod; 
  while 
  Panopaea, 
  Gly- 
  

   cymeris, 
  Terebratula, 
  Cemoria, 
  Trichotropis, 
  Bostellaria, 
  Can- 
  

   cellaria, 
  and 
  probably 
  Cyprma 
  and 
  Cardita, 
  do 
  not 
  seem 
  to 
  have 
  

   passed 
  to 
  the 
  south 
  of 
  it. 
  Of 
  the 
  197 
  marine 
  species, 
  83 
  do 
  not 
  

   pass 
  to 
  the 
  south 
  shore 
  and 
  50 
  are 
  not 
  found 
  on 
  the 
  north 
  shore 
  

   of 
  the 
  Cape. 
  The 
  remaining 
  64 
  take 
  a 
  wider 
  range, 
  and 
  are 
  

   found 
  on 
  both 
  sides. 
  Buzzard's 
  Bay 
  and 
  the 
  south 
  shore 
  have 
  

   as 
  yet 
  been 
  very 
  little 
  explored 
  ; 
  and 
  we 
  may 
  yet 
  expect 
  to 
  find 
  

   many 
  species 
  peculiar 
  to 
  those 
  localities." 
  

  

  If 
  Cape 
  Cod 
  represents 
  the 
  terminal 
  moraine 
  of 
  one 
  

   or 
  more 
  glacial 
  periods, 
  the 
  conclusion 
  forced 
  upon 
  us 
  is 
  

   that 
  before 
  this 
  barrier 
  existed 
  the 
  southern 
  molluscan 
  

   fauna 
  extended 
  along 
  the 
  entire 
  New 
  England 
  shores, 
  to 
  

   Maine 
  arid 
  beyond, 
  as 
  indicated 
  by 
  the 
  southern 
  shells 
  

   found 
  in 
  the 
  bowlder 
  clays 
  of 
  the 
  Boston 
  Basin. 
  In 
  the 
  

   quiet 
  and 
  warmer 
  inlets 
  north 
  of 
  Cape 
  Cod 
  a 
  few 
  south- 
  

   ern 
  forms 
  are 
  found 
  living. 
  

  

  Dr. 
  W. 
  Gr. 
  Farlow, 
  in 
  his 
  report 
  on 
  the 
  Marine 
  Algas 
  of 
  

   New 
  England, 
  published 
  in 
  the 
  Eeport 
  of 
  the 
  United 
  

   States 
  Fish 
  Commission, 
  1879, 
  regarding 
  southern 
  forms 
  

   in 
  waters 
  north 
  of 
  Cape 
  Cod, 
  says 
  : 
  

  

  "In 
  the 
  town 
  of 
  Gloucester, 
  near 
  the 
  village 
  of 
  Squam, 
  is 
  a 
  

   small 
  sheet 
  of 
  water 
  called 
  Goose 
  Cove. 
  The 
  narrow 
  entrance 
  

   to 
  the 
  cove 
  has 
  been 
  dammed 
  up, 
  and 
  the 
  water 
  from 
  the 
  ocean 
  

   enters 
  only 
  for 
  a 
  short 
  time 
  at 
  the 
  high 
  tide. 
  In 
  this 
  cove, 
  to 
  

   my 
  surprise, 
  I 
  found 
  Bhabdonia 
  tenera, 
  Gracilaria 
  multipartita, 
  

   Chondria 
  Bailey 
  ana 
  and 
  a 
  large 
  mass 
  of 
  Polysiphonia 
  Harveyi 
  

   and 
  P. 
  Olneyi. 
  In 
  short 
  the 
  flora 
  was 
  entirely 
  different 
  from 
  

   anything 
  I 
  had 
  ever 
  seen 
  before 
  north 
  of 
  Cape 
  Cod, 
  and 
  entirely 
  

   different 
  from 
  that 
  of 
  the 
  adjacent 
  shore, 
  where 
  the 
  flora 
  is 
  

   entirely 
  arctic. 
  Furthermore, 
  Squam 
  is 
  on 
  the 
  northern 
  and 
  

   inner 
  side 
  of 
  Cape 
  Ann, 
  and 
  as 
  there 
  is 
  no 
  connection 
  of 
  Goose 
  

   Cove 
  with 
  the 
  southern 
  side 
  of 
  Cape 
  Ann, 
  and 
  inasmuch 
  as 
  no 
  

   vessels 
  ever 
  enter 
  the 
  cove, 
  it 
  is 
  difficult 
  to 
  account 
  for 
  the 
  pres- 
  

   ence 
  of 
  the 
  sea-weeds 
  which 
  grow 
  there. 
  The 
  water 
  which 
  is 
  

   confined 
  by 
  the 
  dam 
  is 
  much- 
  warmer 
  than 
  that 
  of 
  the 
  surround- 
  

   ing 
  ocean, 
  which 
  would 
  enable 
  the 
  species 
  of 
  warm 
  waters 
  to 
  

   live 
  if 
  they 
  were 
  once 
  introduced, 
  but 
  how 
  are 
  we 
  to 
  suppose 
  

   that 
  the 
  spores 
  were 
  brought 
  into 
  the 
  cove 
  ? 
  It 
  is 
  hard 
  to 
  believe 
  

   that 
  they 
  could 
  have 
  been 
  brought 
  by 
  currents, 
  for, 
  as 
  a 
  matter 
  

   of 
  fact, 
  the 
  currents 
  move 
  in 
  the 
  wrong 
  direction 
  to 
  produce 
  

  

  