﻿430 
  Rev. 
  T. 
  Hincks 
  on 
  the 
  

  

  examined. 
  The 
  ooecium, 
  with 
  its 
  conspicuous 
  oral 
  border, 
  is 
  

   a 
  striking 
  feature 
  as 
  compared 
  with 
  that 
  of 
  P. 
  concinna. 
  

  

  Smitt 
  describes 
  the 
  front 
  wall 
  as 
  thickly 
  punctured 
  ; 
  but 
  

   in 
  the 
  St. 
  -Lawrence 
  specimens 
  it 
  is 
  uniformly 
  granular 
  ; 
  there 
  

   are 
  faint 
  traces 
  of 
  marginal 
  punctures. 
  

  

  Range. 
  Spitzbergen 
  ; 
  Greenland 
  ; 
  Jan 
  Mayen. 
  

  

  Smittia, 
  Hincks. 
  

   Smittia 
  producta, 
  Packard. 
  (Plate 
  XXI. 
  fig. 
  2.) 
  

  

  A 
  number 
  of 
  species 
  from 
  the 
  coast 
  of 
  Labrador 
  have 
  been 
  

   described 
  by 
  Packard 
  *, 
  of 
  which 
  the 
  above 
  is 
  one. 
  I 
  con- 
  

   fess 
  that 
  I 
  have 
  been 
  unable 
  to 
  identify 
  most 
  of 
  them 
  with 
  

   any 
  certainty, 
  even 
  with 
  the 
  help 
  of 
  Prof. 
  Verrill's 
  notes 
  upon 
  

   them. 
  The 
  diagnosis 
  is 
  generally 
  insufficient, 
  and 
  the 
  figures, 
  

   when 
  there 
  are 
  any, 
  are 
  not 
  of 
  a 
  kind 
  to 
  give 
  much 
  assistance. 
  

   The 
  form 
  which 
  I 
  have 
  figured 
  (PI. 
  XXI. 
  fig. 
  2) 
  I 
  refer 
  

   doubtfully 
  to 
  Packard's 
  species. 
  It 
  answers 
  pretty 
  well 
  to 
  

   his 
  description, 
  which 
  is 
  not 
  a 
  very 
  precise 
  one, 
  and 
  in 
  the 
  

   shape 
  of 
  the 
  orifice 
  and 
  the 
  cell 
  it 
  agrees 
  with 
  his 
  figure, 
  

   which 
  is 
  small 
  and 
  obscure, 
  and 
  gives 
  scarcely 
  any 
  detail. 
  I 
  

   have 
  received 
  from 
  Sir 
  J. 
  W. 
  Dawson 
  a 
  tablet 
  bearing 
  a 
  

   specimen 
  which 
  is 
  marked 
  "Lepralia 
  producta, 
  probably 
  

   Packard's 
  spec," 
  and 
  which 
  is 
  identical 
  with 
  the 
  form 
  which 
  

   I 
  refer 
  to 
  this 
  species. 
  

  

  It 
  is 
  very 
  doubtful 
  how 
  far 
  it 
  is 
  well 
  to 
  allow 
  the 
  claim 
  of 
  

   defective 
  diagnosis 
  and 
  to 
  give 
  a 
  place 
  in 
  our 
  system 
  to 
  iden- 
  

   tifications 
  which 
  are 
  of 
  necessity 
  largely 
  conjectural. 
  I 
  

   believe 
  that 
  science 
  would 
  be 
  the 
  gainer, 
  while 
  the 
  student 
  

   would 
  be 
  spared 
  much 
  fruitless 
  labour, 
  by 
  the 
  exercise 
  of 
  

   some 
  rigour 
  in 
  this 
  matter. 
  

  

  The 
  following 
  is 
  a 
  description 
  of 
  the 
  St.-Lawrence 
  species, 
  

   which 
  seems 
  to 
  be 
  probably 
  identical 
  with 
  Packard's 
  Lepralia 
  

   •producta. 
  

  

  Smittia 
  producta 
  j 
  Packard 
  (sp.). 
  

  

  Zocecia 
  large, 
  ovate, 
  often 
  pointed 
  below, 
  irregularly 
  dis- 
  

   posed, 
  very 
  slightly 
  convex 
  (almost 
  flat 
  when 
  old), 
  surrounded 
  

   by 
  raised 
  lines, 
  usually 
  highly 
  calcified, 
  the 
  walls 
  thick 
  and 
  

   dense 
  : 
  surface 
  covered 
  with 
  numerous 
  punctures, 
  a 
  conspicu- 
  

   ous 
  line 
  of 
  larger 
  pores 
  round 
  the 
  margin 
  ; 
  (in 
  young 
  cells) 
  

   roughened 
  by 
  ridge-like 
  elevations 
  and 
  glistening, 
  (in 
  older 
  

   states) 
  of 
  a 
  dull 
  whitish 
  colour, 
  almost 
  smoothorminutelygranu- 
  

  

  * 
  " 
  List 
  of 
  Animals 
  dredged 
  near 
  Caribou 
  Island, 
  Southern 
  Labrador, 
  

   1860," 
  Canadian, 
  Naturalist 
  and 
  Geologist, 
  vol. 
  viii. 
  (1803) 
  p. 
  401. 
  

  

  