INDEX. 



283 



Orchid-houses, foreign snails in, 



199, 231, 263. 

 Orchids, a Helicina found in a case 



of, 199. 

 Orcutt, C. R., on shells in a tank, 



21. 

 Orinoco, rafts of, 129. 



drift -timber from, at Tobago, 



128, 135. 

 Otter's-shell, shoveller-duck caught 



by, 60. 

 Otters, probable dispersal by, 50. 

 Ova. See Eggs. 

 Owls, probable dispersal by means 



of, 162. 

 Oxford, Helix poiuatia in Botanic 



Gardens at, 186. 

 Oxford Street, Dreissena poly- 



niorpha in water-pipes in, 18. 

 Oysters, mice, rat, and fox caught 



by, 58. 

 rails, plover, and cormorant 



caught by, 60, 61. 



Paleozoic coal measures, land- 

 shells of, 115. 



Palm -trunks, shells carried on, 200. 



Paludina vivif>ara^ tenacity of life 

 of, 28. " 

 clinging by closure of oper- 

 culum, 86. 



Parana, rafts of, 1 30. 



Parmacella found near Newcastle, 

 208, 263. 



Partridges, earth on feet of, 158. 



Pariis biarmicits, shells in crop of, 

 160. 



Pascal, L. , on a snail's eggs passing 

 the digestive system of swans, 

 46. 



Payne-Gallwey, Sir R., on a cockle 

 clinging to a dunlin, 59. 



Peacock. See Woodruffe-Peacock. 



Pearce, S. S., on a bivalve clinging 

 . to a frog, 73. 

 on dispersal with chalk, 197. 

 with soil, 198. 



Pearl-mussel. See Unio mar- 



gai'itifer. 

 Peers, J., on bivalves clinging to 



toads, 74. 

 Peewit, cockle clinging to, 59. 

 Pennant, on Helix pomalia in 



Britain, 235. 

 Peregrines, probable dispersal by 



means of, 161-2. 

 Petersfield, attempt to colonize 



Helix pomalia at, 187. 

 Pfeiffer, Madame Ida, tenacity of 



life in Cyclostoma, 113. 

 Pheasant, slugs in crop of, 177. 

 Philippines, floating timber amidst, 



131- 

 land-shells of, 136. 

 Physay in tanks, 19, 21, 22. 

 Physa acuta, in Britain, 224. 

 P. gibbosa, in a tank, 19. 

 P. gyrina, carried with plants, 196. 

 Pickering, Mr., on tenacity of life 



in land-snails, 109, 113. 

 Pidgeon, D., on heart - cockles 

 clinging to fish-hooks, 58. 

 on Helix pomatia, 241. 

 Pigeon, balls of earth on legs of, 54, 

 158. 

 living snails in the crop of, 161, 



163. 

 barley scattered from the crop 

 of, 162. 

 Pine-beds, Bulimus goodallii in, 



230. 

 Pine-plants, supposed dispersal with, 



230. 

 Pisidium, on land, 4, 34. 

 killed by frost, 42. 

 in stomachs of frogs, 45. 

 extruded by newts, 46. 

 clinging to water-beetles, 65. 

 to a newt, 72. 

 Pisidiwn or Sphczritim, clinging to 



crayfishes, 83. 

 Pisiditim etheridgei^ clinging to 



water-bugs, 63. 

 P. fo7itinale clinging to Nepa, 62. 



to a water-beetle, 65. 

 Phmorhis, adhering to collecting 

 nets, 16. 

 reviving after being frozen, 42. 



