﻿294: 
  Schuchert 
  — 
  Proper 
  Name 
  for 
  Fossil 
  Beatricea. 
  

  

  B. 
  undulata. 
  This, 
  therefore, 
  becomes 
  the 
  genotype 
  of 
  

   Aulacera. 
  Plummer, 
  under 
  the 
  caption 
  of 
  Univalves, 
  

   speaks 
  of 
  

  

  "A 
  fossil 
  which 
  I 
  venture 
  to 
  place 
  here, 
  and 
  call 
  for 
  present 
  

   convenience, 
  Aulacera. 
  . 
  . 
  . 
  The 
  largest 
  species 
  I 
  have 
  always 
  

   found 
  in 
  the 
  'mar 
  lite'; 
  one 
  specimen, 
  which 
  as 
  usual 
  is 
  not 
  

   perfect, 
  is 
  upwards 
  of 
  two 
  feet 
  long, 
  and 
  another 
  eighteen 
  inches 
  

   long; 
  some 
  have 
  a 
  diameter 
  of 
  but 
  one-fourth 
  of 
  an 
  inch, 
  while 
  

   the 
  larger 
  ones, 
  which 
  instead 
  of 
  being 
  cylindrical 
  are 
  elliptical, 
  

   have 
  a 
  long 
  diameter 
  of 
  irve 
  inches 
  and 
  a 
  transverse 
  diameter 
  

   of 
  three 
  inches. 
  The 
  siphuncle 
  of 
  these 
  large 
  specimens 
  is 
  

   lateral, 
  and 
  varies 
  from 
  two 
  to 
  two 
  and 
  a 
  half 
  inches 
  in 
  

   diameter 
  . 
  . 
  . 
  

  

  "As 
  none 
  of 
  my 
  scientific 
  friends, 
  who 
  on 
  visiting 
  this 
  place, 
  

   have 
  seen 
  it, 
  and 
  none 
  who 
  have 
  received 
  casts 
  of 
  it 
  appear 
  to 
  

   have 
  been 
  acquainted 
  with 
  it, 
  it 
  is 
  probably 
  not 
  common, 
  and 
  

   perhaps 
  is 
  new. 
  The 
  Aulacera, 
  as 
  I 
  have 
  provisionally 
  named 
  

   this 
  fossil, 
  is 
  a 
  long, 
  somewhat 
  cylindrical 
  body, 
  coarsely 
  and 
  

   unequally 
  fluted 
  throughout 
  its 
  whole 
  length, 
  and 
  having 
  a 
  

   tubular 
  cavity 
  passing 
  through 
  it 
  longitudinally. 
  The 
  specimen, 
  

   in 
  my 
  possession, 
  though 
  evidently 
  imperfect, 
  is 
  about 
  three 
  feet 
  

   in 
  length, 
  and 
  tapers 
  gently 
  to 
  one 
  end, 
  which 
  is 
  almost 
  entire. 
  

   The 
  larger 
  extremity 
  presents 
  a 
  fractured 
  surface 
  of 
  an 
  oval 
  form, 
  

   two 
  and 
  three 
  quarter 
  inches 
  by 
  two 
  inches 
  in 
  diameter. 
  Being 
  

   broken 
  into 
  several 
  pieces, 
  the 
  fossil 
  exhibits 
  the 
  large 
  siphun- 
  

   culoid 
  cavity, 
  either 
  filled 
  or 
  lined 
  with 
  calcareous 
  spar, 
  and 
  a 
  

   light 
  colored 
  interior, 
  while 
  the 
  whole 
  surface 
  of 
  the 
  specimen 
  

   is 
  of 
  a 
  darkish 
  brown 
  and 
  resembles 
  an 
  extremely 
  thin 
  cuticle. 
  

   I 
  have 
  repeatedly, 
  but 
  in 
  vain, 
  sought 
  for 
  a 
  multilocular 
  struc- 
  

   ture 
  in 
  this 
  probable 
  nondescript; 
  not 
  the 
  slightest 
  indication 
  

   can 
  be 
  detected 
  of 
  any 
  kind 
  of 
  structure, 
  besides 
  what 
  I 
  have 
  

   already 
  mentioned, 
  unless 
  I 
  may 
  add 
  two 
  sharp 
  lines 
  which 
  run 
  

   along 
  opposite 
  sides 
  of 
  the 
  fossil, 
  as 
  if 
  they 
  were 
  the 
  sutures 
  of 
  

   a 
  long 
  pod. 
  The 
  sketch 
  [fig. 
  1] 
  on 
  the 
  preceding 
  page 
  will 
  give 
  

   you 
  a 
  tolerable 
  idea 
  of 
  its 
  appearance. 
  . 
  . 
  . 
  " 
  

  

  In 
  1861, 
  A. 
  E. 
  Verrill, 
  N. 
  S. 
  Shaler, 
  and 
  Alpheus 
  Hyatt, 
  

   then 
  students 
  of 
  Louis 
  Agassiz, 
  spent 
  two 
  months 
  on 
  the 
  

   island 
  of 
  Anticosti, 
  and 
  among 
  other 
  fossils 
  collected 
  an 
  

   abundance 
  of 
  Beatricea. 
  One 
  specimen 
  is 
  13-5 
  feet 
  long- 
  

   by 
  8-5 
  inches 
  in 
  diameter, 
  and 
  Hyatt 
  estimated 
  that 
  the 
  

   original 
  length 
  "was 
  certainly 
  not 
  less 
  than 
  20 
  feet." 
  

   In 
  the 
  summer 
  of 
  1908 
  the 
  writer 
  also 
  collected 
  on 
  this 
  

   island, 
  and 
  saw, 
  many 
  specimens 
  of 
  BeoAricea. 
  Almost 
  

   all 
  of 
  them 
  are 
  prostrate 
  in 
  the 
  strata, 
  having 
  been 
  broken 
  

   away 
  from 
  their 
  basal 
  attachments, 
  but 
  the 
  latter 
  are 
  

   often 
  seen, 
  and 
  some 
  are 
  quite 
  large 
  expansions, 
  still 
  

   stuck 
  to 
  the 
  places 
  where 
  they 
  grew. 
  We 
  must, 
  there- 
  

  

  