﻿228 
  Scientific 
  Intelligence. 
  

  

  a 
  flat 
  cone 
  or 
  plate, 
  the 
  irregular 
  spicular 
  bundles 
  of 
  which 
  are 
  

   continued 
  into 
  the 
  upright 
  wall 
  of 
  the 
  sponge. 
  Around 
  the 
  edge 
  

   of 
  the 
  base 
  is 
  a 
  frill 
  extending 
  outward 
  and 
  offering 
  a 
  broader 
  

   surface 
  for 
  attachment, 
  but 
  this 
  also 
  is 
  merely 
  an 
  extension 
  from 
  

   the 
  main 
  wall. 
  It 
  is 
  possible 
  that 
  the 
  spicules 
  of 
  the 
  Dictyo- 
  

   spongidae 
  never 
  attained 
  the 
  complex 
  and 
  striking 
  development 
  

   found 
  in 
  the 
  sarcode 
  of 
  living 
  Hexactinellids. 
  

  

  While 
  these 
  features 
  of 
  recent 
  species 
  are 
  indicative 
  of 
  their 
  

   later 
  geological 
  age, 
  and 
  although 
  they 
  have 
  lost 
  some 
  of 
  their 
  

   primitive 
  simplicity, 
  it 
  can 
  hardly 
  be 
  said 
  that 
  they 
  have 
  made 
  

   any 
  positive 
  advancement. 
  On 
  the 
  contrary, 
  when 
  we 
  consider 
  

   the 
  maximum 
  size, 
  variety 
  of 
  form, 
  and 
  abundance 
  of 
  species 
  

   characterizing 
  the 
  Upper 
  Devonian 
  and 
  Lower 
  Carboniferous, 
  

   it 
  must 
  be 
  concluded 
  that 
  these 
  periods 
  witnessed 
  the 
  culmina- 
  

   tion 
  of 
  the 
  Lyssacine 
  Hexactinellida. 
  j. 
  jb. 
  

  

  4. 
  International 
  Congress 
  of 
  Geology 
  — 
  The 
  eighth 
  session 
  of 
  the 
  

   a 
  Congres 
  geologique 
  international 
  " 
  will 
  be 
  held 
  in 
  Paris 
  during 
  

   the 
  coming 
  August, 
  16-28, 
  in 
  connection 
  with 
  the 
  Exposition 
  

   Universelle. 
  The 
  sessions 
  open 
  on 
  the 
  16th 
  in 
  the 
  pavilion 
  of 
  

   the 
  Exposition, 
  and 
  close 
  on 
  the 
  28tb, 
  but 
  will 
  not 
  be 
  continuous, 
  

   several 
  days 
  during 
  the 
  period 
  being 
  reserved 
  to 
  permit 
  the 
  mem- 
  

   bers 
  to 
  visit 
  the 
  Exposition. 
  It 
  is 
  proposed 
  to 
  have 
  the 
  meetings 
  

   divided 
  into 
  four 
  sections 
  : 
  

  

  1. 
  General 
  Geology 
  and 
  "Tectonique." 
  

  

  2. 
  Stratigraphy 
  and 
  Paleontology. 
  

  

  3. 
  Mineralogy 
  and 
  Petrography. 
  

  

  4. 
  Applied 
  Geology 
  and 
  Hydrology. 
  

  

  A 
  long 
  and 
  attractive 
  series 
  of 
  excursions 
  is 
  announced, 
  each 
  of 
  

   them 
  under 
  able 
  leadership 
  ; 
  some 
  of 
  these, 
  as 
  to 
  the 
  Ardennes, 
  

   Touraine, 
  Bretagne, 
  etc., 
  will 
  be 
  taken 
  before 
  the 
  Congress 
  ; 
  

   others 
  to 
  the 
  Tertiary 
  of 
  the 
  Paris 
  Basin 
  during 
  the 
  sessions, 
  and 
  

   a 
  longer 
  series 
  to 
  distant 
  points 
  in 
  the 
  Alps, 
  the 
  Pyrenees, 
  and 
  

   elsewhere 
  after 
  the 
  close 
  of 
  the 
  Congress. 
  

  

  Members 
  may 
  secure 
  hotel 
  accommodations 
  during 
  their 
  stay 
  

   in 
  Paris 
  at 
  reasonable 
  rates 
  through 
  the 
  agency 
  of 
  the 
  Societe 
  des 
  

   Voyages 
  modernes, 
  1, 
  Rue 
  de 
  l'Echelle, 
  Paris. 
  Correspondence 
  

   should 
  be 
  addressed 
  to 
  the 
  Secretary, 
  M. 
  Charles 
  Barrois, 
  Boule- 
  

   vard 
  Saint 
  Michel 
  62, 
  Paris. 
  The 
  treasurer 
  is 
  M. 
  Leon 
  Carez 
  ;, 
  

   the 
  president, 
  M. 
  Albert 
  Gaudry, 
  membre 
  de 
  l'Institut. 
  

  

  5. 
  Beitrage 
  zur 
  Geologie 
  und 
  Petrographie 
  Chile's; 
  by 
  F. 
  von 
  

   Wolff 
  (Inaug. 
  Diss. 
  Berlin 
  1899, 
  pp. 
  85). 
  — 
  The 
  material 
  upon 
  

   which 
  this 
  work 
  is 
  based 
  was 
  collected 
  by 
  the 
  late 
  Dr. 
  W. 
  

   Moericke 
  during 
  his 
  travels 
  in 
  Chili 
  in 
  1896. 
  A 
  sketch 
  of 
  the 
  

   general 
  geology 
  is 
  given 
  accompanied 
  by 
  a 
  map 
  upon 
  which 
  the 
  

   petrographic 
  localities 
  are 
  noted. 
  The 
  petrographic 
  portion 
  is 
  

   divided 
  into 
  a 
  description 
  of 
  the 
  older 
  rocks 
  of 
  the 
  coastal 
  zone,, 
  

   the 
  eruptive 
  rocks 
  of 
  the 
  Cordilleran 
  upland, 
  the 
  granular 
  and 
  

   porphyritic 
  rocks 
  of 
  the 
  Andean 
  group 
  and 
  the 
  later 
  lavas 
  of 
  the 
  

   Andean 
  high 
  plateau. 
  

  

  The 
  Andean 
  rocks, 
  which 
  consist 
  chiefly, 
  as 
  might 
  be 
  expected,, 
  

   of 
  the 
  diorite-andesite 
  group, 
  are 
  the 
  most 
  interesting 
  and 
  their 
  

  

  