﻿306 
  Scientific 
  Intelligence. 
  

  

  of 
  the 
  back 
  cover 
  as 
  recent 
  as 
  January 
  1919. 
  The 
  author 
  com- 
  

   pleted 
  the 
  writing 
  of 
  the 
  report 
  in 
  August 
  1918, 
  and 
  the 
  book 
  

   was 
  received 
  at 
  New 
  Haven 
  February 
  10, 
  1919. 
  In 
  a 
  previous 
  

   notice 
  we 
  called 
  attention 
  to 
  this 
  matter 
  of 
  antedating 
  by 
  the 
  

   Texas 
  Survey, 
  and 
  yet 
  it 
  goes 
  on 
  without 
  reform. 
  

  

  The 
  present 
  memoir 
  is 
  of 
  great 
  importance 
  in 
  stratigraphy 
  and 
  

   paleontology 
  in 
  that 
  it 
  describes 
  sixteen 
  genera 
  (new 
  ones 
  being 
  

   Perrinites, 
  Uddenites, 
  Prothalassoceras, 
  Marathonites, 
  Vidrio- 
  

   ceras) 
  and 
  twenty-eight 
  new 
  species 
  of 
  Permian 
  ammonites. 
  It 
  

   is 
  the 
  result 
  of 
  an 
  important 
  paleontologic 
  discovery, 
  and 
  the 
  

   author 
  makes 
  full 
  use 
  of 
  his 
  great 
  find, 
  discussing 
  the 
  fossils 
  not 
  

   only 
  in 
  respect 
  to 
  their 
  evolution 
  and 
  faunal 
  interrelations, 
  but 
  

   their 
  significance 
  in 
  stratigraphy 
  as 
  well. 
  His 
  correlations 
  have 
  

   to 
  do 
  both 
  with 
  the 
  fixing 
  of 
  the 
  strata 
  in 
  the 
  Permian 
  system 
  

   and 
  the 
  synchronizing 
  throughout 
  the 
  world 
  of 
  the 
  Texas 
  forma- 
  

   tions 
  that 
  yield 
  ammonites. 
  Clearly 
  there 
  is 
  in 
  Texas 
  a 
  well 
  

   developed 
  Lower 
  Permian 
  system. 
  

  

  The 
  more 
  ancient 
  of 
  these 
  ammonites 
  are 
  the 
  oldest 
  known 
  Per- 
  

   mo-Carboniferous 
  forms. 
  Aside 
  from 
  the 
  cephalopods, 
  the 
  fauna 
  

   has 
  many 
  species 
  with 
  "decidedly 
  Pennsylvanian 
  characters," 
  

   but 
  these 
  fossils 
  are 
  not 
  treated 
  in 
  this 
  work. 
  Bose's 
  chief 
  strati- 
  

   graphic 
  results 
  in 
  tabular 
  form 
  are 
  as 
  follows 
  : 
  

  

  Permian 
  system 
  

  

  (1) 
  Thuringian, 
  and 
  (2) 
  Saxonian 
  series. 
  Not 
  present 
  in 
  

   America. 
  The 
  Bellerophon 
  limestone 
  of 
  the 
  Alps 
  and 
  the 
  Hun- 
  

   garites-Otoceras 
  beds 
  of 
  Armenia 
  are 
  of 
  Thuringian 
  time. 
  The 
  

   Chideru 
  group 
  and 
  the 
  Upper 
  Productus 
  limestone 
  of 
  India, 
  

   along 
  with 
  a 
  part 
  of 
  the 
  Virgal 
  group 
  and 
  the 
  Middle 
  Productus 
  

   limestone, 
  equal 
  the 
  Thuringian 
  and 
  Saxonian. 
  

  

  Upper 
  Permo-Carboniferous 
  series, 
  or 
  Upper 
  Artinskian. 
  At 
  

   the 
  top 
  of 
  the 
  Texas 
  section 
  occur 
  the 
  Tessey, 
  Gilliam 
  and 
  Vidrio 
  

   formations, 
  devoid 
  of 
  ammonites, 
  and 
  equivalent 
  to 
  the 
  Capitan 
  

   limestone 
  of 
  Texas. 
  Below 
  these 
  comes 
  the 
  Word 
  formation, 
  or 
  

   zone 
  of 
  Waagenoceras, 
  having 
  also 
  Medlicottia, 
  Gastrioceras 
  

   (2 
  spp.), 
  Paraceltites 
  (2), 
  Agathiceras, 
  Adrianites, 
  and 
  Stacheo- 
  

   ceras 
  (2), 
  and 
  correlated 
  with 
  the 
  Delaware 
  division 
  of 
  Texas, 
  

   the 
  Sosio 
  beds 
  of 
  Sicily, 
  and 
  the 
  Amb 
  and 
  Lower 
  Productus 
  lime- 
  

   stones 
  of 
  India. 
  

  

  Leonard 
  formation, 
  or 
  zone 
  of 
  Perrinites 
  (2), 
  having 
  also 
  Med- 
  

   licottia, 
  Gastrioceras, 
  and 
  Paralecanites, 
  and 
  correlated 
  with 
  the 
  

   Double 
  Mountain 
  and 
  Clear 
  Fork 
  divisions, 
  and 
  with 
  the 
  upper 
  

   part 
  of 
  the 
  Ilueco 
  series 
  of 
  Texas. 
  

  

  Lower 
  Permo-Carboniferous 
  series, 
  or 
  Lower 
  Artinskian. 
  

   Hess 
  limestone, 
  or 
  zone 
  of 
  Prothalassoceras 
  and 
  Marathonites. 
  

   Also 
  correlated 
  with 
  the 
  Wichita 
  and 
  Albany 
  formations 
  of 
  

   central 
  Texas. 
  Then 
  follows 
  an 
  unconformity, 
  below 
  which 
  is 
  

   the 
  Wolfcamp 
  formation, 
  or 
  zone 
  of 
  Uddenites 
  (2), 
  having 
  also 
  

  

  