46. Physa heterostropha, Say ; ditches, &c., &c. 47. P. In- 

 tegra ? Hald. ; rare ; river. 48. P. elongata, Say ; stagnant cold 

 water. 



49. Planorhis trivolvis, Say ; stagnant water. 50. P. hicari- 

 natvs, Say; river. 51. P. armigerus, Say; stagnant water; 

 rare. 52. P. dejlectus. Say ; lakes. 53. P. hirsutus, Say ; 

 lakes. 54, P. parims, Say ; lakes and stagnant pools. 55. P. 

 campaniilatus, Say ; lakes. 



56. Ancylus rivularis'? lakes, on water plants. 57. A. ? 



Mohawk River ; very rare. 



58. Helix alholabris, Say ; wooded sections generally. 59. 

 H. alternata, Say ; wooded sections generally. 60. H. arborea^ 

 Say ; old fallen timber, &c., &c. ; 61. ^ chersina, Say ; swampy 

 grounds, under foliage. 62. H. concava, Say; swampy grounds, 

 under leaves, &c. ()3. H. elecfriua, Gould ; moist places. Q4:. JI. 

 fallax, Say (small var.) ; under rubbish in wooded sections. 

 65. ff.fuliginosa, Say; very rare ; habits little known. 66. If. 

 hydrophila, Ingalls ; moist banks of rivers, in shade. 67. H. in- 

 dentata, Say (with 63) ; quite rarely found. 68. H. intertexta, 

 Binney ; woods. 69. H. lineata, Say ; under logs ; very rare. 

 70. H. lucuhrata, Say ; very rare. 71. H. minuta. Say ; damp 

 places. 72. H. monodon^ Rackett ; under stones and sticks. 

 73. H.palliata, Say; woods. 74. H. Sayii, Binney; very rare. 

 75. H. striatella, Anthony; dry and moist localities. 76. If. 

 thyroidus, Say ; shaded flats. 



77. Succinea ohliqua, Say ; swampy flats, shaded. 78. S. 



? {campestris of DeKay) ; hills. 79. S. vermetus, Say; 



shady banks of river. 80. *S'. avara, Say ; shores of lakes. 



81. S. ovalis, Say; margins of ditches, &c., &c. 82. S. , 



similar to ovalis ; animal entirely black ; shores of lakes. 



83. Bulimus luhricus, Brug. ; moist, shady places. 



84. Pupa modesta. Say ; very rare. 85. P. exigua, Say ; 

 damp places. 86. P. contracta, Say ; damp places. 87. P. 

 milium, Gould ; rare. 



NOTES. 



No. 17, Cyclas modesta, Prime, may be the same as O. eden- 

 iula. Say. Mr. Prime is of a different opinion, however. 



No. 30 probably embraces two species, one of which is decisa. 



