LIST Of MEMBER^. 265 



1895. Swanton, E. \V. , The Educational Museum, Haslemere, Surrey. 



1888. Sykes, Ernest Ruthven, B.A., F.L.S., etc., 3, Gray's Inn Place, Gray's 



Inn, London, W.C. 

 1895. Sykes, Robert Dardsley, Lostock Mall, near Preston, Lanes. 



1895. Taylor, Frederick, 42, Landseer Street, Park Road, Oldham, Lanes. 



1897. Taylor, Rev. George W., F. R.S.Canada, etc., St. Matthew's Rectory, 

 Wellington, British Columbia. 



O Taylor, John W., F.L.S., North Grange, Horsforth, Leeds. 



1895. Thompson, Isaac C, F. L.S., 53, Croxteth Road, Liverpool. 



1886. Tomlin, J. R. Brockton, M.A., Estyn, Chester. 



1897. Tulk-Hart, Eugene John, M.D. , 4, Gloucester Place, Brighton. 



1898. Turner, E. Hartley, A.C.A., 21, Bairstow Street, Preston, Lanes. 



1899. Vaughan, J. Williams, J. P., The Skreen, Erwood, R.S.O., Radnorshire, 



S. Wales ; winter address : Bryn-y-Mon, Tenby, S. Wales. 



1897. Vignal, Louis, 28, Avenue Duquesne, Paris. 



1902. Vincent, C. W., 39, West Bank, Stamford Hill, London, N. 



1902. Wadsworth, J. T., 15, Deramore Street, Moss Side, Manchester. 



1898. Wakefield, H. Rowland, 7, Montpelier Terrace, Swansea, S. Wales. 

 1 89 1. Walker, Bryant, 18, Moffat Building, Detroit, Michigan, U.S.A. 

 190J.Z^ Watson, Hugh, Bracondale, The Avenue, Cambridge. 



1886. Watson, Rev. R. Hoog, LL.D., F.L.S., etc., 11, Strathearn PI., Edinburgh. 



1900. Webb, W^alter, F. , 416, Grand Avenue, Rochester, N.Y. , U.S.A. 



1895. Webb, Wilfred Mark, F.Z.S., 7, Campbell Road, Hanwell, London, W. 



1902. Weeks, Wm. H., jr., 508, Willoughby Avenue, Brooklyn, U.S.A. 



1895. Welch, Robert John, 49, Lonsdale Street, Belfast. 



1897. West, H. J., 80, Upland Road, East Dulwich, London, S.E. 



1886. Whitwell, Wm., F.L.S., Underbill, Kidderminster Road, Hagley, near 

 Stourbridge. 



1901. Wilde, J. W. , 17, Hendon Road, Sparkbrook, Birmingham. 



1889. Williams, John M., 20, Hackins Hey, Liverpool. 



1891. WiUiamson, Rev. Charles Arthur, M.A., 14, Upper Mount Street, Dublin. 



1899. Wilson, Arthur Ernest, 228, Victoria Street, Grimsby. 



1890. Wood, Albert, Midland Lodge, Sutton Coldfield, Warwickshire. 

 ipoi.ZWoodruffe-Peacock, Rev. E. A., F.L S , etc., Cadney, Brigg, Lines. 



1898. Woods, Henry, M.A., P\G.S., St. John's College, Cambridge. 



1886. Z Woodward, Bernard B., F.L.S., etc., 120, The Grove, Ealing, London, W. 

 1895. Wright, Charles East, Woodside, Rockingham Road, Kettering. 



Self-Fecundation in Planorbis vortex.— On February 2nd, 1901, an adult 

 specimen of Planorbis vortex was isolated under the following conditions : A glass 

 vessel of 60-oz. capacity, being three-fcnuths filled with boiled water, a small quan- 

 tity of weed was placed in it, and the remaining fourth-part of the vessel was filled 

 with pure oxygen. The whole was perfectly sealed up, and this condition was main- 

 tained for eighteen months until August, 1902. During this period the water 

 remained exceptionally clear and the weed in good condition. The snail on the 

 whole was rather inactive, often spending weeks together adhering to the glass high 

 and dry above the water. In June, 1902, after sixteen months of complete and 

 absolute isolation, it deposited some eggs ; early in July these hatched out, produc- 

 ing twenty-seven young, many of which are still thriving in their confined situation. 

 — W. H. Chadwick {Read hefoix the Society, December loth, 1902). 



