﻿32 
  GEOLOGICAL 
  MEMOIRS. 
  

  

  chiopoda 
  having 
  a 
  St. 
  Cassian 
  facies, 
  including 
  Spirigera 
  Caledonica, 
  

  

  S. 
  Planchesi, 
  and 
  Spirifer 
  ? 
  The 
  interest 
  of 
  this 
  discovery 
  is 
  

  

  enhanced 
  by 
  its 
  application 
  to 
  M. 
  Zittel's 
  researches 
  in 
  the 
  Trias 
  of 
  

   New 
  Zealand, 
  at 
  Richmond, 
  near 
  Nelson, 
  where 
  Avicula 
  salinaria, 
  

   var. 
  JRichmondiana, 
  Zittel, 
  is 
  a 
  dominant 
  form. 
  The 
  extension 
  of 
  the 
  

   Trias 
  in 
  Turkey, 
  the 
  Himalayas, 
  New 
  Caledonia, 
  New 
  Holland, 
  and 
  

   New 
  Zealand 
  is 
  now 
  incontrovertible. 
  [P. 
  M. 
  D.] 
  

  

  The 
  Jurassic 
  Rocks 
  of 
  Hanover. 
  By 
  Karl 
  von 
  Seebach. 
  

  

  [Der 
  Hannoversche 
  Jura, 
  &c. 
  4to. 
  1864, 
  Berlin, 
  pp. 
  1 
  60 
  ; 
  one 
  map 
  and 
  ten 
  plates.] 
  

  

  The 
  author 
  occupied 
  himself 
  with 
  the 
  researches 
  on 
  which 
  this 
  work 
  

   is 
  based, 
  in 
  the 
  summers 
  of 
  1861 
  and 
  1862, 
  for 
  the 
  sake 
  of 
  describing 
  

   the 
  geology 
  of 
  the 
  district 
  and 
  of 
  getting 
  together 
  a 
  collection 
  of 
  

   North- 
  German 
  fossils 
  for 
  the 
  museum 
  of 
  the 
  Gottingen 
  University, 
  

   the 
  authorities 
  of 
  which, 
  indeed, 
  helped 
  him 
  with 
  a 
  liberal 
  grant. 
  

   In 
  the 
  prosecution 
  of 
  his 
  work, 
  and 
  in 
  preparing 
  the 
  results 
  for 
  the 
  

   press, 
  Herr 
  von 
  Seebach 
  acknowledges 
  the 
  kind 
  assistance 
  of 
  Blasius, 
  

   Braum, 
  Credner, 
  A. 
  Roemer, 
  H. 
  Roemer, 
  F. 
  Roemer, 
  A. 
  Schlonbach, 
  

   "W". 
  Schlonbach, 
  von 
  Strombeck, 
  Unger, 
  Volkner, 
  and 
  Witte. 
  

  

  In 
  the 
  autumn 
  of 
  1862 
  he 
  visited 
  England 
  to 
  study 
  the 
  Oolitic 
  

   strata, 
  especially 
  their 
  upper 
  division, 
  and 
  to 
  see 
  the 
  type-specimens 
  

   of 
  Sowerby's 
  ' 
  Mineral 
  Conchology 
  ' 
  ; 
  and 
  he 
  offers 
  his 
  thanks 
  to 
  

   Messrs. 
  Damon, 
  Etheridge, 
  Leckenby, 
  Lycett, 
  Moore, 
  Morris, 
  Phillips, 
  

   Wright, 
  and 
  especially 
  H. 
  Woodward, 
  for 
  ready 
  aid 
  freely 
  given. 
  

   At 
  Berlin 
  also 
  von 
  Seebach 
  studied 
  Jurassic 
  fossils, 
  at 
  the 
  University 
  

   Museum 
  and 
  the 
  Mining 
  School, 
  and 
  in 
  Dr. 
  Ewald's 
  collection 
  ; 
  and 
  

   he 
  acknowledges 
  Prof. 
  Beyrich's 
  important 
  assistance, 
  with 
  which 
  he 
  

   was 
  favoured. 
  

  

  Whilst 
  his 
  work 
  was 
  at 
  press, 
  other 
  memoirs 
  on 
  North-German 
  

   geology 
  appeared, 
  of 
  which 
  he 
  was 
  not 
  able 
  to 
  avail 
  himself, 
  

   namely, 
  H. 
  Credner 
  on 
  the 
  Members 
  of 
  the 
  Upper 
  Jura- 
  formation 
  

   and 
  the 
  Wealden 
  in 
  North-west 
  Germany, 
  W. 
  Schlonbach 
  on 
  the 
  

   Ironstone 
  of 
  the 
  Middle 
  Lias 
  in 
  North-western 
  Germany, 
  and 
  R. 
  

   Wagener 
  on 
  the 
  Jurassic 
  Eormations 
  of 
  the 
  district 
  between 
  the 
  

   Teutoburger 
  Walde 
  and 
  the 
  Weser. 
  Two 
  other 
  works, 
  by 
  Dr. 
  

   Braum 
  and 
  Dr. 
  H. 
  Credner, 
  are 
  expected 
  to 
  appear 
  before 
  long. 
  

  

  Von 
  Seebach 
  offers 
  these 
  results 
  of 
  his 
  examination 
  of 
  the 
  Jurassic 
  

   rocks 
  and 
  fossils 
  of 
  Hanover 
  (or, 
  rather, 
  of 
  North-west 
  Germany), 
  

   not 
  as 
  a 
  perfect 
  work, 
  to 
  be 
  compared 
  with 
  Quenstedt's 
  Swabian 
  

   / 
  Jura/ 
  the 
  labour 
  of 
  fifteen 
  years, 
  but 
  as 
  a 
  prodromus, 
  serving 
  as 
  

   a 
  basis 
  for 
  further 
  work 
  in 
  details, 
  and 
  to 
  supply 
  a 
  general 
  sketch 
  

   such 
  as 
  may 
  enable 
  foreign 
  geologists 
  to 
  compare 
  their 
  own 
  with 
  

   the 
  Jurassic 
  formation 
  of 
  North-western 
  Germany, 
  — 
  the 
  special 
  

   works 
  by 
  A. 
  Roemer, 
  F. 
  Roemer, 
  and 
  Yon 
  Strombeck 
  having 
  mainly 
  

   local 
  characters. 
  A 
  short 
  account 
  of 
  the 
  geographical 
  conditions 
  of 
  

   the 
  " 
  Jura 
  " 
  in 
  North-western 
  Germany 
  forms 
  the 
  first 
  section 
  of 
  this 
  

   work 
  (pp. 
  9-13), 
  with 
  references 
  to 
  published 
  maps 
  and 
  memoirs. 
  

  

  