﻿Geology 
  and 
  Mineralogy. 
  75 
  

  

  A 
  comparison 
  of 
  the 
  figures 
  of 
  Ctenichnites 
  ingens 
  with 
  those 
  

   of 
  Eoichnites 
  and 
  some 
  forms 
  of 
  Mednsich?iites 
  induces 
  the 
  

   opinion 
  that 
  they 
  are 
  not 
  to 
  be 
  separated 
  even 
  specifically. 
  Some 
  

   of 
  the 
  first 
  have 
  the 
  lines 
  wider 
  apart 
  than 
  those 
  of 
  the 
  second, 
  

   and 
  are 
  less 
  curved 
  than 
  the 
  third, 
  but 
  the 
  variability 
  in 
  all 
  is 
  so 
  

   great 
  that 
  to 
  draw 
  a 
  line 
  anywhere 
  between 
  them 
  is 
  a 
  task 
  that 
  

   few 
  would 
  dare 
  undertake. 
  

  

  Under 
  Psammichnites 
  he 
  refers 
  to 
  certain 
  specimens 
  found 
  in 
  

   St. 
  John 
  which 
  seem 
  to 
  him 
  probably 
  " 
  may 
  have 
  been 
  made 
  by 
  

   by 
  a 
  Psammichnites" 
  From 
  this 
  it 
  would 
  appear 
  that 
  Mr. 
  

   Matthew 
  considers 
  Psammichnites 
  to 
  be 
  an 
  animal 
  form 
  of 
  some 
  

   sort. 
  The 
  general 
  opinion 
  is 
  (Hancock, 
  Haughton, 
  Torell 
  and 
  

   Nathorst) 
  that 
  the 
  forms 
  described 
  under 
  that 
  name 
  are 
  only 
  

   tracks. 
  

  

  Under 
  Froena 
  a 
  new 
  species, 
  F 
  ramosa, 
  is 
  described, 
  and 
  under 
  

   Arenicolites 
  also, 
  a 
  new 
  form, 
  A. 
  brevis, 
  is 
  given. 
  Still 
  a 
  fourth 
  

   genus, 
  Goniadnichnites, 
  with 
  one 
  species, 
  G. 
  trichiformis, 
  is 
  

   created, 
  and 
  on 
  very 
  slender 
  grounds. 
  Small, 
  slender 
  and 
  thread- 
  

   like, 
  the 
  name 
  is 
  given 
  because 
  of 
  their 
  resemblance 
  to 
  tracks 
  

   made 
  by 
  recent 
  Goniada. 
  The 
  figure 
  bears 
  some 
  resemblance 
  to 
  

   certain 
  branching 
  forms 
  of 
  graptolites 
  like 
  Dendrograptus 
  tenui- 
  

   ramosus, 
  from 
  the 
  Utiea 
  Slate 
  of 
  New 
  York. 
  

  

  Last 
  of 
  all 
  the 
  new 
  species 
  is 
  an 
  addition 
  to 
  Torrell's 
  Monocra- 
  

   terion, 
  under 
  the 
  name 
  of 
  Mr 
  magnificum. 
  From 
  the 
  plate 
  it 
  is 
  

   well 
  named, 
  for 
  from 
  a 
  central 
  cavity 
  two 
  inches 
  in 
  its 
  longer 
  

   diameter, 
  and 
  one 
  and 
  a 
  quarter 
  inches 
  in 
  its 
  shorter, 
  spread 
  out 
  

   filaments, 
  called 
  " 
  tentacles," 
  three 
  inches 
  in 
  length 
  : 
  and 
  this 
  

   figure 
  is 
  reduced 
  one-third. 
  If 
  this 
  burrow 
  were 
  made 
  by 
  a 
  

   worm, 
  it 
  must 
  have 
  been 
  a 
  gigantic 
  creature. 
  

  

  In 
  studying 
  this 
  paper 
  of 
  Mr. 
  Matthew's 
  we 
  cannot 
  but 
  regret 
  

   that 
  he 
  has 
  made 
  his 
  many 
  new 
  genera 
  and 
  species 
  upon 
  such 
  

   scanty 
  material. 
  As 
  objects 
  illustrating 
  some 
  phase 
  of 
  sedimen- 
  

   tation, 
  or 
  the 
  possibility 
  of 
  some 
  sort 
  of 
  life 
  having 
  existed, 
  these 
  

   markings 
  are 
  of 
  interest. 
  But 
  it 
  is 
  a 
  useless 
  burden 
  upon 
  science 
  

   to 
  give 
  to 
  them 
  generic 
  and 
  specific 
  names. 
  

  

  Joseph 
  F. 
  James. 
  

  

  Washington, 
  D. 
  0., 
  June 
  13, 
  1891. 
  

  

  4. 
  Etudes 
  des 
  gites 
  mineraux 
  de 
  la 
  France. 
  Bassin 
  Houiller 
  

   et 
  Per 
  mien 
  d' 
  Autun 
  et 
  d' 
  Epinac. 
  Fasc. 
  II, 
  Flore 
  fossile, 
  Pre- 
  

   miere 
  partie, 
  par 
  R. 
  Zeiller. 
  Pp. 
  1-304. 
  Atlas, 
  xxvii 
  plates, 
  

   4°. 
  — 
  This 
  fascicle 
  begins 
  the 
  third 
  of 
  a 
  series 
  of 
  valuable 
  recent 
  

   works 
  on 
  the 
  flora 
  of 
  the 
  Carboniferous 
  epoch 
  in 
  France. 
  Of 
  

   these 
  three, 
  the 
  first, 
  on 
  the 
  flora 
  of 
  the 
  Valenciennes 
  basin, 
  by 
  

   M. 
  R. 
  Zeiller, 
  dated 
  1888, 
  is 
  the 
  most 
  important 
  work 
  in 
  French 
  

   on 
  the 
  Paleozoic 
  flora 
  since 
  the 
  " 
  Histoire 
  " 
  of 
  Brongniart, 
  with 
  

   which 
  it 
  will 
  take 
  a 
  place 
  as 
  a 
  classic 
  in 
  paleobotanical 
  literature. 
  

   The 
  first 
  part 
  of 
  the 
  second 
  work, 
  on 
  the 
  Commentry 
  flora, 
  in 
  

   which 
  the 
  ferns 
  are 
  monographed 
  by 
  Zeiller, 
  bears 
  the 
  same 
  date; 
  

   but 
  the 
  second 
  part, 
  under 
  the 
  joint 
  authorship 
  of 
  MM. 
  B. 
  

   Renault 
  and 
  Zeiller 
  was 
  not 
  finished 
  until 
  1890. 
  The 
  present 
  

  

  