﻿598 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  * 
  

  

  f 
  

  

  " 
  Till 
  '' 
  and 
  stratified 
  drift 
  .10 
  feet 
  

  

  Quartz 
  gravel 
  45 
  " 
  

  

  Red 
  and 
  blue 
  "loam 
  " 
  or 
  sandy 
  clay 
  20 
  " 
  

  

  Diatomaceous 
  earth 
  3 
  " 
  

  

  Yellow 
  and 
  red 
  stratified 
  sand 
  , 
  20 
  feet 
  

  

  Eed 
  plastic 
  clay 
  20 
  " 
  

  

  Brown 
  plastic 
  clay 
  25 
  

  

  a 
  

  

  Total 
  143 
  " 
  

  

  " 
  The 
  bed 
  of 
  diatomaceous 
  earth 
  is 
  of 
  undetermined 
  extent^ 
  

   and 
  appears 
  to 
  be 
  replaced 
  a 
  little 
  to 
  the 
  east 
  by 
  a 
  blue 
  clay, 
  

   which, 
  however, 
  contains 
  some 
  diatoms. 
  It 
  is 
  undoubtedly 
  equiv- 
  

   alent 
  to 
  the 
  bed 
  of 
  ochre 
  which 
  overlies 
  the 
  sand 
  throughout 
  the 
  

   remainder 
  of 
  the 
  section." 
  

  

  The 
  following 
  diatoms, 
  all 
  freshwaiter 
  species, 
  occur 
  in 
  it. 
  

  

  Melosira 
  granulata 
  (Ehr.) 
  Ealfs 
  

  

  StepJianodiscus 
  Niagaras 
  (Ehr.) 
  

  

  Epithemia 
  turgida 
  (Ehr.) 
  Kutz. 
  

  

  Encyonema 
  ventricosum 
  Kutz. 
  

  

  Cymhella 
  delicatula 
  Kutz. 
  

  

  Cymhella 
  cuspidata 
  Kutz. 
  

  

  Navicula 
  viridis 
  Kutz. 
  

  

  " 
  coconeiformis 
  Greg. 
  

  

  " 
  major 
  Kutz. 
  

  

  " 
  varians 
  Greg. 
  

  

  " 
  lata 
  Breb. 
  

   Eunotia 
  monodon 
  Ehr. 
  

   Gomphonema 
  capitatum 
  Ehr. 
  

   Stauroneis 
  PJioenecenteron 
  Ehr. 
  

   Fragilaria 
  construans 
  Grun. 
  

   Synedra 
  afjinis 
  K. 
  B. 
  

   Campyloneis 
  Grevillei 
  var. 
  regalis. 
  

   Triceratium 
  trifoliatum 
  

  

  