﻿A. 
  M. 
  Edwards 
  — 
  Infusorial 
  Earths 
  of 
  Pacific 
  Coast. 
  383 
  

  

  personal 
  examination 
  of 
  the 
  original 
  material 
  in 
  the 
  Bailey 
  

   Collection, 
  Boston. 
  

  

  * 
  10. 
  57. 
  Monterey, 
  Cal. 
  

  

  A 
  sub-Peat 
  deposit 
  of 
  Melosira 
  varians 
  with 
  sporangia. 
  

   There 
  are 
  small 
  quantities 
  of 
  Synedra 
  radians, 
  Nitsckia 
  

   linearis 
  and 
  Fragillaria 
  mrescens. 
  

  

  * 
  13. 
  Dalles 
  of 
  the 
  Columbia, 
  O. 
  

  

  A 
  sub-Peat 
  deposit 
  containing 
  sand 
  and 
  Orthosir 
  a 
  punctata. 
  

  

  * 
  20. 
  17. 
  Monterey, 
  Cal. 
  

  

  A 
  specimen 
  of 
  a 
  Miocene, 
  Oligocene 
  or 
  Eocene 
  Tertiary 
  as 
  

   is 
  proved 
  by 
  the 
  shells 
  of 
  Foraminifera 
  contained 
  in 
  it. 
  

  

  Monterey, 
  Cal. 
  

  

  San 
  Francisco, 
  Cal. 
  

  

  San 
  Diego, 
  Cal. 
  

  

  Near 
  Monterey, 
  Cal. 
  

  

  Monterey, 
  Cal. 
  

  

  San 
  Francisco, 
  Cal. 
  

  

  San 
  Diego, 
  Cal. 
  

  

  San 
  Pablo 
  Bay, 
  Cal. 
  

  

  Monterey, 
  Cal. 
  

  

  Monterey, 
  Cal. 
  

  

  San 
  Joaquin 
  Valley, 
  Cal. 
  

  

  These 
  specimens 
  are 
  evidently 
  gatherings 
  made 
  at 
  different 
  

   parts 
  of 
  a 
  marine 
  fossiliferous 
  deposit 
  discovered 
  by 
  "W. 
  P. 
  

   Blake 
  and 
  described 
  by 
  him 
  in 
  the 
  Proceedings 
  of 
  the 
  Phila- 
  

   delphia 
  Academy 
  of 
  Natural 
  Sciences, 
  vol. 
  vii, 
  page 
  328 
  for 
  

   1854-5. 
  The 
  locality 
  is 
  mentioned 
  as 
  being 
  about 
  two 
  miles 
  

   distant 
  from 
  the 
  town 
  of 
  Monterey 
  and 
  the 
  stratum 
  is 
  revealed 
  

   on 
  the 
  side 
  of 
  a 
  hill 
  some 
  500 
  to 
  600 
  feet 
  high, 
  consisting 
  for 
  

   the 
  most 
  part 
  of 
  this 
  white 
  'infusorial 
  earth' 
  interstratified 
  

   with 
  compact 
  siliceous 
  layers 
  of 
  a 
  dark 
  material 
  supposed 
  to 
  

   be 
  bituminous 
  in 
  character. 
  The 
  earth 
  is 
  similar 
  in 
  most 
  of 
  

   its 
  characters 
  to 
  the 
  celebrated 
  stratum 
  underlying 
  the 
  city 
  of 
  

   Richmond, 
  Virginia. 
  The 
  Diatomacese 
  agree 
  very 
  closely 
  with 
  

   those 
  of 
  Richmond 
  , 
  Petersburg, 
  Piscataway 
  and 
  Nottingham 
  

   deposits 
  which 
  extend 
  from 
  the 
  Patuxent 
  Piver 
  in 
  Maryland 
  

   to 
  Petersburg 
  in 
  Virginia. 
  The 
  genera 
  most 
  largely 
  repre- 
  

   sented 
  are 
  : 
  

  

  Actinocyclus. 
  Biddulphia. 
  Grammatophora. 
  

  

  Actinoptychus. 
  Campylodiscus. 
  Lsthmia. 
  

  

  Arachnoidiscus. 
  Coscinodiscus. 
  Navicula. 
  

  

  Asteromphalus. 
  Creswellia. 
  Rhabdonema. 
  

  

  Aulacodiscus. 
  Gephyria. 
  Triceratium. 
  

   Auliscus. 
  

  

  * 
  9 
  

  

  23. 
  

  

  * 
  3. 
  

  

  1. 
  

  

  * 
  4. 
  

  

  

  * 
  6. 
  

  

  56. 
  

  

  * 
  9. 
  

  

  60. 
  

  

  *11. 
  

  

  58. 
  

  

  * 
  14. 
  

  

  28. 
  

  

  * 
  15. 
  

  

  9. 
  

  

  * 
  21. 
  

  

  24. 
  

  

  *23. 
  

  

  

  *25. 
  

  

  

  