﻿Kepoet 
  of 
  the 
  Dieeotoe. 
  9 
  

  

  interesting 
  for 
  study, 
  displaying 
  lines 
  of 
  stratification 
  and 
  

   other 
  features, 
  by 
  the 
  aid 
  of 
  which 
  large 
  series 
  of 
  them 
  can 
  

   be 
  definitely 
  grouped 
  and 
  referred 
  to 
  the 
  corresponding 
  strata 
  

   in 
  the 
  clay 
  beds, 
  where 
  their 
  strange 
  and 
  often 
  beautiful 
  forms 
  

   were 
  developed. 
  

  

  Through 
  the 
  expenditure 
  authorized 
  by 
  the 
  Commissioners 
  

   of 
  the 
  Land 
  Office, 
  a 
  greatly 
  needed 
  requirement 
  of 
  the 
  Mu- 
  

   seum, 
  viz., 
  a 
  working-room 
  on 
  each 
  floor, 
  has 
  been 
  in 
  part 
  sup- 
  

   plied. 
  Hitherto 
  whenever 
  extensive 
  examination, 
  comparison 
  

   or 
  relabeling 
  of 
  any 
  of 
  the 
  material 
  of 
  the 
  collections 
  were 
  

   required, 
  it 
  was 
  necessary 
  to 
  carry 
  it 
  down 
  one, 
  two, 
  three 
  or 
  

   four 
  stair 
  ways 
  to 
  the 
  director' 
  s 
  room 
  or 
  to 
  the 
  hall 
  below, 
  

   incurring, 
  in 
  transit, 
  in 
  addition 
  to 
  the 
  labor 
  involved, 
  the 
  

   risk 
  of 
  displacement 
  of 
  labels, 
  and 
  by 
  a 
  single 
  misstep, 
  an 
  

   irreparable 
  injury 
  to 
  the 
  more 
  fragile 
  zoological 
  specimens. 
  

  

  With 
  some 
  iron-railing, 
  which 
  had 
  formerly 
  been 
  in 
  use 
  in 
  the 
  

   Museum, 
  an 
  inclosure 
  of 
  nine 
  feet 
  by 
  twenty-three 
  has 
  been 
  

   constructed 
  on 
  the 
  central 
  portion 
  of 
  this 
  floor. 
  Upon 
  the 
  

   rails, 
  a 
  wire 
  netting 
  is 
  carried 
  up 
  to 
  a 
  sufficient 
  height 
  to 
  

   give 
  protection 
  to 
  whatever 
  material 
  may 
  be 
  under 
  examina- 
  

   tion 
  or 
  preparation 
  on 
  the 
  tables 
  within. 
  Three 
  sides 
  of 
  the 
  

   inclosure 
  are 
  occupied 
  with 
  the 
  tables, 
  giving 
  seventy-eight 
  

   square 
  feet 
  of 
  area, 
  and 
  beneath 
  one 
  of 
  them 
  sixty 
  drawers 
  are 
  

   arranged, 
  having 
  an 
  area 
  of 
  one 
  hundred 
  and 
  sixty-five 
  

   square 
  feet. 
  

  

  Until 
  this 
  room 
  was 
  provided, 
  it 
  was 
  impracticable 
  to 
  under- 
  

   take 
  the 
  long 
  contemplated 
  revision 
  of 
  the 
  North 
  American 
  

   land 
  and 
  fresh-water 
  shells, 
  which 
  will 
  now 
  be 
  proceeded 
  with 
  

   as 
  soon 
  as 
  the 
  services 
  of 
  Dr. 
  Lewis 
  can 
  be 
  obtained. 
  

  

  On 
  the 
  Third 
  Floor 
  y 
  valuable 
  additions 
  have 
  been 
  made 
  to 
  

   the 
  alcoholic 
  collection 
  of 
  Echino 
  dermata, 
  Mollusca, 
  Crus- 
  

   tacea 
  and 
  Pisces, 
  through 
  collections 
  made 
  at 
  Cape 
  Cod 
  Bay 
  

   and 
  Penikese 
  Island, 
  by 
  the 
  Director 
  and 
  Mr. 
  C. 
  E. 
  Hall, 
  which 
  

   will 
  be 
  found 
  recorded 
  in 
  their 
  proper 
  place. 
  Several 
  of 
  the 
  

   species 
  were 
  obtained 
  in 
  sufficient 
  quantity 
  to 
  afford 
  numer- 
  

   ous 
  duplicate 
  specimens 
  for 
  exchanges. 
  

  

  Several 
  dissections 
  of 
  Lepas 
  fascicular 
  is, 
  exhibiting 
  both 
  

   the 
  outer 
  and 
  inner 
  surfaces 
  of 
  the 
  carina, 
  the 
  terga, 
  and 
  

   the 
  scuta, 
  have 
  been 
  arranged 
  among 
  the 
  New 
  York 
  Crus- 
  

   2 
  

  

  