IS 40.] Luinean Socieiif. 65 



April 7. 



Mr. Forster, Y.P., in the Chair. 



The Rev. John Berrington, A.M., of Kingston, Surrey, and Si- 

 gi&mond Rucker, Jun., Esq., of Wandsworth, were elected Fellows ; 

 and Mr. Henry Letheby, of Pentonville, was elected an Associate of 

 the Society. 



Dr. Farre, F.L.S., exhibited specimens of a singular form of gall 

 on the leaves of a species of oak from Mexico. The gall consisted 

 of an aggregation of hollow cylindrical tubes, nearly an inch in 

 length, and furnished with a fringed orifice. The tubes were 

 remarkable for their elegance and uniformity ; their colour was 

 white, suffused with red, especially towards the apex. 



Mr. Yarrell, F.L.S., exhibited a specimen of a satin-like mass of 

 Conferva fiuviatilis, w^hich grew in a water meadow near Totness. 

 A spring, which flows only in wdnter, rises in the meadow, and this 

 substance is taken from naiTow gutters, from one of which, twelve 

 inches wide, a piece was taken up which measured seventy-nine feet 

 in length, so firm and tough was its consistence ; and another piece 

 broke off at thirty-nine feet. In consistence and appearance it bore 

 considerable resemblance to a piece of cotton wadding, but of a 

 firmer texture. A portion was carefully examined under the micro- 

 scope, and found to consist entirely of an interwoven mass of filaments 

 of Conferva fiuviatilis. The plant was compared mth the authentic 

 specimen of that species preserved in the Linnaean Herbarium, and 

 was seen to differ only in the greater length of the articulations. 

 The under surface of the mass was of a bright green colour, but the 

 upper surface was white from the effects of direct exposure to the 

 air and light, which had caused the death of the plant at that part. 



Read, a continuation of Mr. Smith's "Arrangement of the Genera 

 of Ferns." 



April 21. 



The Lord Bishop of Norwich, President, in the Chair, 



Read, a paper by John Blackwall, Esq., F.L.S., entitled " The 

 Difference in the Number of Eyes with which Spiders are provided. 



No. Vin. PfiOCEEDIXGS OF THE LiXXEAN SoCIETV, 



