﻿438 
  Geological 
  Society. 
  

  

  the 
  well-known 
  fact 
  that 
  great 
  numhers 
  of 
  insects, 
  injurious 
  and 
  

   otherwise, 
  are 
  constantly 
  being 
  destroyed 
  by 
  the 
  action 
  of 
  parasitic 
  

   Fungi, 
  the 
  mode 
  of 
  operation 
  of 
  which 
  he 
  describes 
  very 
  clearly, 
  

   and 
  he 
  refers 
  to 
  various 
  naturalists 
  who 
  entertained 
  the 
  notion 
  that 
  

   something 
  might 
  be 
  done 
  for 
  the 
  destruction 
  of 
  insects 
  injurious 
  to 
  

   agriculture 
  by 
  favouring 
  the 
  propagation 
  of 
  these 
  insidious 
  enemies. 
  

   The 
  first 
  who 
  attempted 
  to 
  realize 
  this 
  idea 
  appears 
  to 
  have 
  been 
  

   the 
  Russian 
  naturalist 
  Metschnikoff, 
  and 
  on 
  his 
  being 
  prevented 
  by 
  

   other 
  work 
  from 
  continuing 
  his 
  researches 
  in 
  this 
  direction 
  M. 
  

   Krassilstchik 
  undertook 
  to 
  carry 
  on 
  the 
  work. 
  He 
  notices 
  the 
  

   difficulties 
  which 
  stand 
  in 
  the 
  way 
  of 
  the 
  successful 
  prosecution 
  of 
  

   this 
  curious 
  cultivation, 
  and 
  indicates, 
  but 
  only 
  in 
  general 
  terms, 
  

   how 
  these 
  were 
  overcome, 
  so 
  that 
  he 
  is 
  able 
  to 
  estimate 
  that 
  the 
  

   quantity 
  of 
  spores 
  of 
  at 
  all 
  events 
  one 
  species, 
  Isaria 
  destructor, 
  

   which 
  is 
  particularly 
  destructive 
  to 
  Cleonus 
  punctiventris, 
  itself 
  a 
  

   special 
  enemy 
  of 
  the 
  beet, 
  necessary 
  for 
  the 
  infection 
  of 
  1 
  hectare 
  

   ( 
  = 
  about 
  2k 
  acres) 
  will 
  cost 
  only 
  10 
  francs. 
  The 
  spores 
  are 
  spread 
  

   over 
  the 
  fields 
  either 
  along 
  with 
  the 
  manure 
  or 
  mixed 
  with 
  sand, 
  

   and 
  in 
  experimental 
  " 
  sowings 
  " 
  of 
  this 
  kind 
  very 
  distinct 
  epidemics 
  

   of 
  the 
  parasites 
  were 
  produced, 
  amounting 
  in 
  ten 
  days 
  or 
  a 
  fortnight 
  

   to 
  from 
  55 
  to 
  80 
  per 
  cent, 
  of 
  the 
  insects. 
  

  

  In 
  Palaeontology 
  we 
  find 
  an 
  important 
  note 
  by 
  M. 
  Dollo 
  on 
  the 
  

   cranium 
  of 
  the 
  Mosasauridse, 
  illustrated 
  with 
  several 
  woodcuts 
  of 
  

   parts 
  of 
  the 
  skull 
  and 
  with 
  a 
  large 
  plate 
  containing 
  figures 
  of 
  the 
  

   crania 
  of 
  Mosasaurus 
  and 
  Hainosaurus, 
  and, 
  further, 
  an 
  article 
  by 
  

   the 
  same 
  author 
  on 
  the 
  signification 
  of 
  the 
  pendent 
  trochanter 
  in 
  

   Dinosaurs. 
  

  

  Of 
  course 
  in 
  a 
  notice 
  such 
  as 
  this 
  it 
  is 
  impossible 
  either 
  to 
  enume- 
  

   rate 
  all 
  the 
  articles 
  contained 
  in 
  the 
  volume 
  or 
  to 
  give 
  more 
  than 
  a 
  

   passing 
  reference 
  to 
  those 
  which 
  are 
  mentioned, 
  and 
  with 
  the 
  excep- 
  

   tion 
  of 
  M. 
  Krassilstchik's 
  paper 
  we 
  have 
  done 
  little 
  more 
  than 
  

   indicate 
  the 
  titles. 
  Nevertheless 
  we 
  hope 
  that 
  we 
  have 
  said 
  enough 
  

   to 
  show 
  that 
  the 
  ' 
  Bulletin 
  Scientifique 
  ' 
  in 
  its 
  new 
  form 
  promises 
  to 
  

   play 
  an 
  important 
  part 
  in 
  the 
  advancement 
  of 
  Natural 
  History, 
  

   and 
  that 
  the 
  reader 
  may 
  expect 
  to 
  find 
  throughout 
  its 
  pages 
  much 
  

   sound 
  and 
  useful 
  information. 
  

  

  PROCEEDINGS 
  OF 
  LEARNED 
  SOCIETIES. 
  

  

  GEOLOGICAL 
  SOCIETY. 
  

  

  March 
  20, 
  1889.— 
  W. 
  T. 
  Blanford, 
  LL.D., 
  F.R.S., 
  

   President, 
  in 
  the 
  Chair. 
  

  

  The 
  following 
  communication 
  was 
  read 
  : 
  — 
  

  

  " 
  Note 
  on 
  the 
  Pelvis 
  of 
  Omithopsis" 
  By 
  Prof. 
  H. 
  G. 
  Seeley, 
  

   F.R.S., 
  F.G.S. 
  

  

  The 
  remains 
  preserved 
  in 
  Mr. 
  Leeds's 
  collection 
  at 
  Eyebury, 
  and 
  

   described 
  by 
  Mr. 
  Hulke, 
  are 
  the 
  largest 
  and 
  most 
  perfect 
  pelvic 
  

  

  