﻿756 
  Forty- 
  seventh 
  Report 
  on 
  the 
  State 
  Museum. 
  

  

  1877. 
  

  

  S. 
  T. 
  Barrett. 
  — 
  Notes 
  upon 
  the 
  Lower 
  Helderberg 
  Rocks 
  of 
  Port 
  

   Jervis, 
  N. 
  Y. 
  

  

  (Amer. 
  Jour. 
  Science, 
  vol. 
  13, 
  pp. 
  385-387.) 
  

  

  J. 
  M. 
  Clarke. 
  — 
  The 
  Bellona 
  Foot-tracks. 
  

   (Ontario 
  County 
  Times, 
  December 
  10.) 
  

  

  S. 
  W. 
  Ford. 
  — 
  Note 
  on 
  Mici'odiscus 
  speciosus. 
  

   (Amer. 
  Jour. 
  Science, 
  vol. 
  13, 
  p. 
  141.) 
  

  

  S. 
  W. 
  Ford. 
  — 
  On 
  some 
  Embryonic 
  Forms 
  of 
  Trilobites 
  from 
  the 
  

   Primoidal 
  Rocks 
  at 
  Troy, 
  N. 
  Y. 
  

  

  (Amer. 
  Jour. 
  Science, 
  vol. 
  13, 
  pp. 
  265-273, 
  pi. 
  iv.) 
  

  

  Elias 
  Lewis, 
  Jr. 
  — 
  Certain 
  Features 
  of 
  the 
  Valleys 
  or 
  Water- 
  

   courses 
  of 
  Southern 
  Long 
  Island. 
  

  

  (Amer. 
  Jour. 
  Science, 
  vol. 
  13, 
  pp. 
  215, 
  216.) 
  

  

  Elias 
  Lewis, 
  Jr. 
  — 
  On 
  Water-courses 
  upon 
  Long 
  Island. 
  

   (Amer. 
  Jour. 
  Science,* 
  vol. 
  13, 
  pp. 
  142-146.) 
  

  

  N. 
  S. 
  Shaler. 
  — 
  On 
  the 
  existence 
  of 
  the 
  Alleghany 
  Division 
  of 
  the 
  

   Appalachian 
  Range 
  within 
  the 
  Hudson 
  Valley. 
  

   (Amer. 
  Naturalist, 
  vol. 
  11, 
  pp. 
  627, 
  628.) 
  

  

  F. 
  W. 
  Simokds. 
  — 
  The 
  Geology 
  of 
  Ithaca, 
  N. 
  Y., 
  and 
  the 
  vicinity. 
  

   (Amer. 
  Naturalist, 
  vol. 
  11, 
  pp. 
  49-51.) 
  

  

  1878. 
  

  

  C. 
  Callaway. 
  — 
  On 
  the 
  correlation 
  of 
  the 
  Lower 
  Helderberg 
  Group 
  

   of 
  New 
  York. 
  

  

  (Geological 
  Magazine, 
  vol. 
  5, 
  pp. 
  271-277.) 
  

  

  T. 
  N. 
  Dale. 
  — 
  A 
  contribution 
  to 
  the 
  Palaeontology 
  of 
  the 
  Vicinity 
  

   of 
  Poughkeepsie, 
  N. 
  Y. 
  

  

  (Proc. 
  Poughkeepsie 
  Soc. 
  Nat. 
  Hist., 
  December 
  4.) 
  

  

  S. 
  W. 
  Ford. 
  — 
  Descriptions 
  of 
  two 
  new 
  species 
  of 
  Primordial 
  

   Fossils. 
  

  

  (Amer. 
  Jour. 
  Science, 
  vol. 
  15, 
  pp. 
  124-127.) 
  

  

  S. 
  W. 
  Ford. 
  — 
  Note 
  on 
  Lingulella 
  cselata. 
  

   (Amer. 
  Jour. 
  Science, 
  vol. 
  15, 
  pp. 
  127-129.) 
  

  

  S. 
  W. 
  Ford. 
  — 
  Note 
  on 
  the 
  Development 
  of 
  Olenellus 
  asaphoides. 
  

   (Amer. 
  Jour. 
  Science, 
  vol. 
  15, 
  pp. 
  129, 
  130.) 
  

  

  L. 
  P. 
  Gratacap. 
  — 
  The 
  Ice 
  Age. 
  

   (Pop 
  Sci. 
  Mo., 
  vol. 
  12, 
  p. 
  319.) 
  

  

  