﻿118 
  Twenty 
  -eighth 
  Eeport 
  on 
  the 
  State 
  Museum. 
  

  

  ing 
  lip 
  on 
  one 
  side 
  ; 
  variable 
  in 
  their 
  distance 
  from 
  each 
  other, 
  

   and 
  sometimes 
  quite 
  closely 
  arranged. 
  Surface 
  marked 
  by 
  

   elevated 
  maculae, 
  upon 
  which 
  there 
  are 
  a 
  few 
  larger 
  cell- 
  aper- 
  

   tures 
  irregularly 
  disposed, 
  the 
  center 
  of 
  the 
  tubercle 
  being 
  

   sometimes 
  quite 
  free 
  from 
  cells. 
  

  

  The 
  specimen 
  figured 
  has 
  a 
  convex 
  exterior 
  surface, 
  ow- 
  

   ing 
  to 
  the 
  contraction 
  of 
  the 
  epitheca, 
  and 
  on 
  some 
  weathered 
  

   portions, 
  where 
  the 
  cell-apertures 
  are 
  distant, 
  the 
  interspaces 
  

   are 
  apparently 
  cellulose. 
  This 
  feature, 
  however, 
  is 
  not 
  a 
  pre- 
  

   vailing 
  one, 
  nor 
  has 
  it 
  any 
  specific 
  signification. 
  In 
  a 
  speci- 
  

   men 
  where 
  the 
  celluliferous 
  face 
  is 
  concave, 
  the 
  exterior 
  or 
  epi- 
  

   thecal 
  side 
  presents 
  the 
  same 
  aspect 
  as 
  that 
  of 
  ordinary 
  forms, 
  

   and 
  is 
  undistinguishable 
  from 
  them. 
  The 
  maculate 
  form 
  of 
  

   surface, 
  or 
  its 
  incipient 
  condition, 
  is 
  very 
  common 
  upon 
  all 
  

   forms 
  of 
  the 
  celluliferous 
  face 
  of 
  this 
  fossil. 
  

  

  The 
  variety 
  is 
  herewith 
  separated 
  from 
  the 
  forms 
  figured 
  

   as 
  L. 
  concentrica 
  in 
  the 
  Documentary 
  Edition 
  of 
  this 
  Report. 
  

  

  SAGENELLA 
  Hall. 
  

   Sag-enella 
  elegans. 
  

  

  Plate 
  7, 
  Figs. 
  12, 
  13. 
  

  

  Sagenella 
  elegans 
  Hall. 
  Doc. 
  Edit. 
  28th 
  Rep. 
  St. 
  Mus. 
  Nat. 
  Hist. 
  Explanation 
  

  

  of 
  pi. 
  7, 
  figs. 
  12, 
  13. 
  1876. 
  

   Compare 
  S. 
  membranacea 
  Hall. 
  Pal. 
  N. 
  Y., 
  vol. 
  ii, 
  p. 
  172, 
  pi. 
  40E, 
  figs. 
  Q 
  a, 
  6 
  b. 
  

  

  Bryozoum 
  a 
  thin 
  membraniform 
  expansion 
  growing 
  upon 
  

   the 
  surface 
  of 
  other 
  organic 
  bodies. 
  Cells 
  subcylindrical, 
  

   flattened 
  for 
  the 
  greater 
  portion 
  of 
  their 
  length 
  and 
  continu- 
  

   ing 
  nearly 
  parallel 
  with 
  the 
  plane 
  of 
  the 
  epitheca 
  ; 
  arranged 
  in 
  

   a 
  more 
  or 
  less 
  diverging 
  or 
  radiating 
  order, 
  with 
  intercalated 
  

   ranges, 
  presenting 
  a 
  subimbricated 
  aspect, 
  turning 
  abruptly 
  

   and 
  opening 
  upward. 
  Cell-apertures 
  circular, 
  about 
  .2 
  mm. 
  

   in 
  diameter. 
  

  

  The 
  arrangement 
  of 
  cells 
  and 
  form 
  of 
  cell-apertures 
  differ 
  from 
  

   Ceramopora 
  in 
  the 
  rounded 
  form 
  and 
  more 
  directly 
  upward 
  

   opening. 
  The 
  genus 
  differs 
  from 
  Lichen 
  alia 
  in 
  the 
  more 
  ex- 
  

   tended 
  procumbent 
  portion 
  of 
  the 
  cell-tube, 
  in 
  the 
  form 
  of 
  the 
  

   cell-aperture, 
  and 
  in 
  the 
  much 
  thinner 
  and 
  persistently 
  adher- 
  

   ing 
  epitheca. 
  

  

  