268 



INDEX. 



Brazil, observation by Darwin in, 29. 

 Brick-pits, shells in, 17. 

 Bridgman, W. K., Planorbis nautl- 

 lens found among floating 

 weed, 34. 



P. nitidus and a Valvata 

 amongst confervoid vegeta- 

 tion, 52. 

 Bristol, Testacella niaugei near, 

 228. 



Bulimus goodallii near, 230, 



Clausilia solidaw&d^x, 261. 

 British Isles, introduced molluscs 

 established in: 



Dreissena poly Dior pha, 181, 209, 

 210. 



Planorbis dilatatus, 209, 221. 



Physa acuta, 224. 



Testacella maugei, 288. 



BtiUniiis goodallii (in green- 

 houses), 229. 



Helix terrestris^ 232. 



the occurrence of other species 

 foreign to the fauna of, 226, 

 234, 251. 



doubtfully indigenous species 

 in, 209, 234 et seq. 



specimens of the indigenous 

 Planorbis glaber perhaps 

 introduced into, 210. 

 British land and fresh-water shells, 



Conchological Society's list of, 

 209, 227. 

 British Museum, specimens illus- 

 trating means of dispersal 

 exhibited in, 74, 78, 81. 



the Guernsey specimen of 

 Helix aperta not to be found 

 in, 256. 

 Broderip, Mr., snail revived by, 



112. 



on the supposed naturalization 

 of Stclijmts nndatiis near 

 Liverpool, 202, 259. 

 Brown, Captain, on Dreissena 

 polymorpha in Britain, 213, 

 218. 



on Helix pomatia in Britain, 

 240. 

 Brown, R., on dispersal by ice, 123. 



by floating timber, 139. 



Bryant, J., Dreissena polymorpha, 

 discovered in Britain by, 

 211. 



Buckland, Mr., rail caught by an 

 oyster, 60. 



Buenos Ayres, Helix pomatia at, 



179- 

 snails from, colonized in York- 

 shire, 192, 202. 

 Helix lac tea in markets at, 

 204. 



Building materials, dispersal with, 

 198. 



Bulimi, carried with dye-woods, 

 201, 202. 



Bulimus decollatns, attempted colo- 

 nization of, in New Jersey, 



193- 

 destruction of snails by, 194. 

 in Britain, 260. 

 B. detritus, at Burton-on-Trent, 



259- 

 B. edwardsianus, carried to New 



Caledonia as an article of 



food, 203. 

 B. eremita, tenacity of life of, 



113. 



B, exilis, in Ireland, 258. 



B. faiciattcs, probable dispersal of, 



by currents, 137. 

 B. goodallii, in Britain, 229. 

 B. octonus, in Britain, 261. 

 B. pallidior, tenacity of life of, ill. 

 B. rosaceus, tenacity of life of, 



112. 

 B. undatus, probable dispersal of, 



by currents, 137. 

 Mr. Binney on the distribution 



of, 138. 

 carried with tropical timber, 



201. 

 its supposed naturalization 



near Liverpool, 202, 259. 

 B. zebra. See B. undatns. 

 Biilinus. See Physa gibbosa. 

 Buriton, discovery of Helix obvohita 



near, 247. 

 Burnley, Planorbis dilatatus at, 



223. 

 Bythinia, clinging to the larva of a 



dragon-fly, 85. 



