﻿FIFTH 
  REPORT 
  OF 
  THE 
  DIRECTOR 
  I908 
  20/ 
  

  

  droid 
  graptolite 
  and 
  representing 
  a 
  genus 
  near 
  Thamnograptus 
  or 
  

   Inocanlis. 
  AMth 
  that 
  supposition, 
  however, 
  the 
  transverse 
  walls 
  

   and 
  bifurcations 
  of 
  the 
  branchlets 
  would 
  be 
  difficult 
  of 
  explanation. 
  

  

  We 
  do 
  not 
  know 
  of 
  either 
  an 
  alga 
  or 
  an 
  animal 
  form 
  of 
  the 
  

   Coelenterata 
  with 
  which 
  Corematocladus 
  densa 
  could 
  be 
  

   directly 
  compared 
  by 
  its 
  habitus. 
  While 
  there 
  are 
  many 
  species 
  

   forming 
  caespitose 
  tufts 
  among 
  the 
  Florideae, 
  which 
  order 
  on 
  ac- 
  

   count 
  of 
  the 
  frequent 
  development 
  of 
  strong 
  cortical 
  cells 
  and 
  the 
  

   transverse 
  septation 
  of 
  the 
  filaments 
  would 
  principally 
  suggest 
  it- 
  

   self 
  for 
  reference, 
  none 
  possess 
  a 
  structure 
  the 
  direct 
  counterpart 
  

   of 
  that 
  of 
  our 
  species. 
  There 
  are, 
  hoAvever, 
  various 
  forms 
  in 
  other 
  

   orders 
  of 
  marine 
  algae 
  which 
  by 
  their 
  composition 
  of 
  a 
  thick 
  main 
  

   axis 
  that 
  bears 
  a 
  dense 
  mass 
  of 
  bifurcating 
  filamentous 
  branchlets 
  

   invite 
  comparison. 
  As 
  such 
  a 
  genus 
  Penicillus 
  among 
  the 
  Codiaceae 
  

   might 
  be 
  cited, 
  in 
  which 
  an 
  incrusted 
  stipe 
  bears 
  a 
  dense 
  terminal 
  

   mass 
  of 
  frequently 
  bifurcating 
  filaments. 
  

  

  Munier 
  Chalmas 
  had 
  thought 
  to 
  have 
  discovered 
  this 
  latter 
  form 
  

   in 
  thin 
  ovoid 
  or 
  fusiform 
  calcareous 
  shells 
  of 
  the 
  Tertiary 
  described 
  

   as 
  Ovulites 
  which 
  possess 
  on 
  their 
  surface 
  pores 
  surrounded 
  by 
  fine 
  

   lines 
  inclosing 
  polygonal 
  spaces, 
  the 
  whole 
  forming 
  a 
  structure 
  sug- 
  

   gesting 
  somewhat 
  of 
  the 
  main 
  stipe 
  of 
  Corematocladus 
  

   densa 
  ; 
  but 
  as 
  Solms-Laubach 
  has 
  pointed 
  out, 
  no 
  such 
  reticu- 
  

   lated 
  design 
  is 
  seen 
  on 
  the 
  surface 
  of 
  the 
  calcified 
  membrane 
  of 
  

   Penicillus, 
  although 
  he 
  recognizes 
  Ovulites 
  as 
  a 
  calcareous 
  alga. 
  

   Our 
  form 
  may 
  have 
  been 
  similar 
  in 
  the 
  structure 
  of 
  the 
  main 
  stipe 
  

   to 
  Ovulites 
  although 
  possessing 
  instead 
  of 
  the 
  calcification 
  a 
  thick 
  

   noncalcareous 
  cortex. 
  

  

  Horizon 
  and 
  locality. 
  In 
  the 
  lower 
  third 
  of 
  the 
  Trenton 
  lime- 
  

   stone 
  at 
  Glens 
  Falls, 
  N. 
  Y. 
  

  

  Mastigograptus 
  ? 
  flaccidus 
  sp. 
  nov. 
  

  

  Plate 
  3, 
  figure 
  6 
  

  

  Associated 
  with 
  the 
  described 
  supposed 
  marine 
  algae 
  in 
  the 
  

   shaly 
  intercalation 
  of 
  the 
  Trenton 
  at 
  Glens 
  Falls 
  and 
  by 
  their 
  

   flaccid 
  character 
  and 
  carbonaceous 
  film, 
  quite 
  apparently 
  belong- 
  

   ing 
  to 
  the 
  same 
  class 
  w4th 
  them, 
  occur 
  slender 
  wormlike 
  irregu- 
  

   larly 
  bent 
  carbonaceous 
  bodies 
  that 
  are 
  distinctly 
  but 
  the 
  

   macerated 
  fragments 
  of 
  larger 
  organisms. 
  In 
  one 
  case 
  the 
  prox- 
  

   imal 
  extremity 
  was 
  observed 
  which 
  is 
  well 
  fitted 
  to 
  throw 
  light 
  

   on 
  the 
  true 
  nature 
  of 
  this 
  form 
  [see 
  pi. 
  3, 
  fig. 
  6]. 
  This 
  shows 
  

   a 
  small 
  attachment 
  plate 
  from 
  which 
  a 
  slender 
  main 
  stipe 
  arises 
  that 
  

   monopodially 
  gives 
  ofif 
  equally 
  flaccid 
  and 
  slender 
  branches. 
  Both 
  

   the 
  stipe 
  and 
  the 
  branches 
  exhibit 
  at 
  regular 
  intervals 
  circular 
  to 
  

  

  