﻿ACADEMY 
  OF 
  SCIENCES. 
  ' 
  297 
  

  

  8. 
  Car 
  drum 
  centifilosum, 
  Cpr. 
  

  

  9. 
  Venericardia 
  borealis, 
  Conr. 
  

  

  10. 
  Ludna 
  NuUaUii, 
  Conr. 
  

  

  11. 
  JJucina 
  borealis, 
  Linn. 
  

  

  12. 
  Ludna 
  (enuisa.dpla, 
  Cpr. 
  

  

  13. 
  Cryptodon 
  fie.xit,of!us, 
  Mont. 
  

  

  14. 
  Modiola 
  recta, 
  Conr. 
  

  

  15. 
  Area 
  microdonta, 
  Conr. 
  

  

  16. 
  Nucula, 
  sp. 
  n. 
  according 
  to 
  Dr. 
  Cooper; 
  named 
  in 
  MSS. 
  by 
  Carpenter. 
  Looks 
  

  

  much 
  like 
  N. 
  tenuis. 
  

  

  17. 
  Acila 
  LyaUii, 
  Baird. 
  This 
  species 
  has 
  been 
  frequently 
  reported 
  as 
  casfrensis, 
  

  

  Hds. 
  

  

  18. 
  Leda 
  coelata, 
  Hinds. 
  

  

  19. 
  Pecten 
  hastalvs, 
  Sby. 
  

  

  20. 
  Amiisium 
  caurinum, 
  Gld. 
  

   ,21. 
  Janlra 
  Jlorida, 
  Hds. 
  

  

  22. 
  Ostrea 
  conchaphila, 
  Cpr. 
  

  

  23. 
  Flacunanomia 
  macroschisma, 
  Desh. 
  

  

  24. 
  lornatina 
  eximia, 
  Baird. 
  

  

  25. 
  Cylichna 
  cyl'mdracea, 
  Linn. 
  

  

  26. 
  Dentalium 
  hexagonum, 
  Sby. 
  

  

  27. 
  Dentalium 
  semipolitum, 
  B. 
  and 
  S. 
  

  

  28. 
  Siphonodentalium 
  pusillum 
  {?), 
  Gabb. 
  

  

  29. 
  Calliostoma 
  anuulatum, 
  Mart. 
  

  

  30. 
  Galerus 
  Jilosus, 
  Gabb, 
  as 
  Trochita. 
  

  

  31. 
  Crepidula 
  navicelloides, 
  Nutt. 
  

  

  32. 
  Crepidula 
  princeps, 
  Conr. 
  This 
  is 
  not 
  (/r«wfZ/s 
  of 
  Midd. 
  

  

  33. 
  Turritella 
  Jewettii, 
  Cpr. 
  

  

  34. 
  Biltium 
  asperum, 
  Cpr. 
  

  

  35. 
  MyurcJla 
  simplex, 
  Cpr. 
  

  

  36-39. 
  Drillia, 
  sp. 
  indet. 
  This 
  and 
  three 
  other 
  forms 
  of 
  DriUia 
  so 
  closely 
  resemble 
  

   Gulf 
  forms, 
  that 
  it 
  is 
  inadvisable 
  to 
  describe 
  them 
  without 
  a 
  comparison 
  of 
  

   specimens. 
  

  

  40. 
  Surcula 
  Carpenteriana, 
  Gabb, 
  and 
  variety 
  Tryoniana, 
  can 
  hardly 
  be 
  separated 
  

  

  as 
  species. 
  The 
  transition 
  is 
  very 
  gradual 
  and 
  complete. 
  

  

  41. 
  Mangelia 
  variec/ata, 
  Cpr. 
  

  

  42-45. 
  Mangelia, 
  spp. 
  indet. 
  The 
  same 
  remark 
  applies 
  here 
  as 
  to 
  No. 
  36. 
  

  

  46. 
  Clathurella 
  Conradiaua, 
  Gabb. 
  The 
  specimens 
  are 
  slightly 
  stouter 
  thanGabb's 
  

  

  figure, 
  but 
  vary 
  among 
  themselves 
  in 
  this 
  respect, 
  and 
  in 
  other 
  characters 
  are 
  

   similar 
  to 
  his 
  species. 
  

  

  47. 
  Odostomia 
  straminea, 
  Cpr. 
  var. 
  

  

  48. 
  Odostomia, 
  sp. 
  indet. 
  Very 
  imperfect. 
  

  

  49. 
  Chemnitzia 
  torquata, 
  Cpr. 
  

  

  50. 
  Eidima 
  rutila, 
  Cpr. 
  

  

  51. 
  Scalaria 
  subcoi-onata, 
  Cpr. 
  

  

  52-56. 
  Cancellaria, 
  4 
  spp. 
  indet. 
  Most 
  of 
  them, 
  as 
  far 
  as 
  memory 
  serves, 
  resemble 
  

  

  southern 
  forms 
  not 
  at 
  hand 
  for 
  comparison. 
  

   56. 
  Neverita 
  Rechiziana, 
  Petit. 
  

  

  