INDEX. 



281 



alive after being frozen, 41. 



experiment with sea-water and 

 Neritina^ 41. 



a shower of, 44. 



dispersal of bivalves while 

 clinging to other animals by 

 closure of their valves, 56. 



of univalves while clinging by 

 closure of the operculum, 85. 



while clinging by adhesion, 86. 



their absence from some oceanic 

 islands, 93. 



want of continuity of habitats 

 of, 99- 

 Molluscs, land, specific areas some- 

 times wide but generally re- 

 stricted, 90. 



kinds found in islands often 

 endemic, 91. 



some genera range widely, 92. 



dispersal of, 95, 115. 



tenacity of life of, 99, 120, 167. 



antiquity of, 1 15. 



sea-water resisted by, 120. 



habitats of, conducive to dis- 

 persal, 132, 140, 146, 169, 



171,173- 



small species, and operculate 

 species, range more widely 

 than large inoperculate kinds, 

 136. 

 the floating or sinking of, when 

 thrown into water, 140, 170. 

 their occurrence in alluvium, 



141. 

 found alive in the crop of a 



bird, 161. 

 dispersal of operculates, 165. 

 of slugs, 167. 

 Moluccas, floating islands among 



the, 131. 

 Moniz, J. M., snail carried to 



Madeira, 199. 

 Monophyletic descent, i. 

 Montagu, on Helix pomatia in 



Britain, 237. 

 Montevideo, pumas landed at, 130. 

 snails from, living in Yorkshire, 

 192, 202. 

 Moor-hen, probable dispersal by, 

 52. 



Morch, Dr., on Dreissena poly- 



ynorpha^ 214. 

 Morrison, J. H., Helix nemoralis m 



Virginia, 180, 200. 

 Morton, J., on colonization of Helix 



po/natia, 187. 

 Moseley, II. N,, on floating timber, 



126, 135. 

 Moss, a Helix found in a consign- 

 ment of, 199. 

 Mountain torrent, dispersal by, 34. 

 Mouse, oyster closing upon, 58. 

 Mussel closing upon the tongue of a 

 fox, 58. 

 upon the foot of a tern, 60. 

 upon the bill of a crow, 60. 

 Mussels, fresh-water. See Anodonta 



and Unio. 

 Musson, C. T., on voluntary migra- 

 tion by a Limncea, 4. 

 on bivalves in isolated ponds, 9. 

 on shells in an iron tank, 19. 

 in a water-butt, 20. 

 on dispersal by floods, 31. 

 on a ball of earth on the leg of 



a bird, 54. 

 on the flying habits of water- 

 beetles, 66. 

 on tenacity of life in a land- 



snail, 108. 

 on a drifted canoe, 128. 

 on Sticcinea arborea living under 



bark, 132. 

 on Helix aspersa living in cut 



bamboos, 140. 

 on dispersal by wind, 148. 

 on dust-whirlwinds, 149. 

 on a beetle and a w^oodlouse 



carrying snails, 155. 

 on a Helix carrying a smaller 



snail, 155. 

 on foreign snails m an orchid - 



house, 198. 

 on transportal of snails at the 



roots of ferns, 200. 

 on Helix pomatia in Britain, 

 240. 



N. 



Nature can afford to wait, 164. 



