112 



INDEX. 



Helix appressa, Say, 31. 



arboreus, Say, 42. 



bucculenta, Gould, 29. 

 var. rufa, Michener, 29. 



cellaria, Mull, 41. 



clausa, Say, 28. 



concava, Say, 36. 



demissa, Binn., 38. 



dentifera, Binn., 30. 



diodonta, Say, 27. 



electrina, Say, 42. 



fallax, Say, 32. 



fuliginosa, Griff., 37. 



gularis,^,^ 1 1\ 



hirsuta, Say, 34. 



hydrophila, Ingalls, 42. 



indentata, Say, 41. 



inflecta, Say, 33. 



inornata, Say, 37. 



interna, Say, 39. 



introferens, Bid., 32. 

 var. minor, 32. 



labyrinthica, Say, 46. 



Icevigata, Pfr., 37. 



/#mz, Say, 37. 



lineata, Say, 48. 



minuscula, Binn., 43. 



minuta, Say, 44. 



minutissima, Lea, 48. 



monodon, Rackett, 33. 



palliata, Say, 30. 



Pennsylvania, Green, 27. 



>/, De Kay, 29. 



Sayii, Binn., 27. 



striatella, Anth., 45. 



subplana, Binn., 38. 



suppressa, Say, 38. 



thyroides, Say, 28. 



tridentata, Say, 31. 

 Hyalina, Fer., 40. 



arborea, Say, 42. 



cellaria, Mull., 41. 



electrina, Gould, 42. 



hydrophila, Ingalls, 42. 



indentata, Say, 41. 



INOPERCULATA, 18-60. 



Leucocheila, Alb. and Mart., 54. 

 armifera, Say, 56. 

 contracta, Say, 56. 

 corticaria, Say, 57. 

 fallax, Say, 56. 

 marginata, Say, 55. 

 pentodon, Say, 55. 



LlMACID^E, 21. 



Limax, Fer., 21. 



agrestis, Linn., 22. 



campestris, Binn., 23. 



carolinensis, Bosc, 19. 



flavus, Linn., 21. 



maximus, Linn., 23. 

 Limncea, Lam., 62. 



caperatus, Say, 66. 



catoscopium, Say, 64. 



columella, Say, 63. 



desidiosa, Say, 65. 



elodes, Say, 64. 



humilis, Say, 65. 



macrostomus, Say, 63. 



reflexus, Say, 65. 

 LIMN^ID^:, 61. 



LlMNOPHILA, 60. 



Limnophysa, Fitz., 64. 



caperata, Say, 66. 



catoscopium, Say, 64. 



desidiosa, Say, 65. 



elodes, Say, 64. 



humilis, Say, 65. 



reflexa, Say, 65. 

 Lioplax, Troschel, 76. 



subcarinata, Say, 77. 



Macrocyclis, Beck, 36. 



concava, Say, 36. 

 Margaritana, Schum., 91. 



margaritifera, Linn., 91. 



marginata, Say, 93. 



undulata, Say, 92. 

 Melania, Lam., 83. 



altilis, Lea, 83. 

 Melantho, Bowditch, 75. 



decisa, Say, 74. 

 Menetus, H. B. Ad., 71. 



