lO PEOCEEDINGS OF THE 



exhibited, one of which had been built upon a book-shelf in one 

 of the studies at Tunbridge School, and another in an old tin tea- 

 pot, which had been flung aside as useless and had lodged in a 

 poplar. 



Mr. B. Shillitoe exhibited andjmade remarks upon a Hyacinth 

 with abnormal bracts. 



An account of British Trap-door Spiders was given by Mr. F. 

 Enock ; and by the aid of the oxy -hydrogen lantern and some 

 excellent slides their appearance and mode of life were graphi- 

 cally delineated and described. 



The following paper was read: — 



"A Monograph of the Acetdbularicey By Grraf zu Solms- 

 Laubach, F.M.L.S. 



May 3rd, 1894. 



Prof. Chaeles Stewart, President, in the Chair. 



The Minutes of the last Meeting were read and confirmed. 



Dr. Johann Mueller and Prof. Dr. Kakichi Mitsukuri were 

 elected Poreign Members. 



Prof. Poulton exhibited the larvae of certain Lepidoptera to 

 illustrate the results of experiments which he had made in 

 regard to the influence of environment upon their colours. 

 Variously coloured twigs and shoots, such as occur in nature, 

 were shown to influence the appearance of many twig-like larvae 

 in such a manner as to favour their concealment. 



Prof. George Bond Howes exhibited and made remarks upon 

 the eggs and young of Ceratodus Forsteri received from Prof. 

 Semon of Jena, who is engaged in working out the development 

 of this fish. He also showed a specimen of Lepidosiren paradoxa, 

 from the backwaters of the upper Paraguay river, an extremely 

 rare fish in collections, and commented upon its anatomy. 



Mr. James Saunders of Luton, with the aid of the oxy-hydrogen 

 lantern, exhibited some drawings of the plasmodium of Didymium 

 squamulosum in the aci of forming sporangia. The specimens 

 had been found upon birch. 



The following papers were read : — 



1. " Notes on the Habits of three Species of Lemna.'''' By 

 H. B. Gruppy. (Communicated by "W. Botting Hemsley, A.L.S.) 



2. " On the Pertilization of certain Malayan Orchids." By 

 H. N. Eidley, P.L.S. 



