559 



of As2)lenium related to A. Trichomanes, i.'' By A. Haro, M.D., of Metz. In the 

 latter commuuication Dr. Haro calls attention to a fern discovered by liimself in the 

 well of an old castle. The well is large, four-cornered, and with a square window at 

 the top in one of the sides. The wall opposite to the window is covered with the fern, 

 which lies flat upon the stones, to which the fronds are attached throughout their whole 

 length by slender roots, and adhere so firmly that it is difficult to remove them, even 

 with a Icnife. A professor, to whom Dr. Haro submitted the plant, regarded it as a 

 new species, and has named it A. Harovii : he has also furnished descriptive charac- 

 ters of the new plant, as well as of the three allied species. A, Trichomanes, viride and 

 Petrarchas. We give the characters of A. Harovii, which is placed between A. Tri- 

 chomanes and viride. 

 A. Harovii. Frond decumbent, fixed to stones by very slender fibrils, glabrous, un- 

 equally pinnate ; stipes blackish-varnished, furnished above vdth an indistinct 

 membrane, running down on each side from the insertion of the pinnules, (ap- 

 pendiculatus) ; middle pinnules hastato-rhomboid, three-lobcd, upper pinnules ob- 

 long, obliquely attenuated or wedge-shaped at the base, unequally pinnatitid, all 

 obtuse but acutely toothed. 

 December 6. — E. Forster, Esq., V.P., in the chair. 



Read, a portion of " An Essay on the Distribution, Vitality, Structure, Modes of 

 Growth and Reproduction, and Uses, of the Fresh-water Confervae." By Arthur Hill 

 Hassall, Esq. 



December 20. — E. Forster, Esq., V.P,, in the chair. 



A. H. Hassall, Esq. exhibited an apple in which decay had been artificially indu- 

 ced by inoculating it with decayed matter from another apple containing filaments of 

 Entophytal Fungi. 



Read, a continuation of Mr. Hassall's memoir on the fresh-water Confervae. 

 Read also, " Some further Observations on the Nature of the Ergot of Grasses." 

 By Edwin John Quekett, Esq., F.L.S. 



BOTANICAL SOCIETV OF LONDON. 



February 17, 1843. — J. E. Gray, Esq., F.R.S. &c., President, in the chair. The 

 following donations were announced. British plants from Dr. Streeten, and foreign 

 plants from Mr. Samuel Simpson. Donations to the library were announced from Mr. 

 H. C. Watson and Mr. E. Newman. Mr. T. Clarke, jun. presented specimens of a 

 very large variety of Lastraea Filix-mas, found by him at King's Clift' Valley, near 

 Bridgewater. 



Mr. G. H. K. Thwaites read a paper, being a Notice of the discovery of Grimmia 

 orbicularis, a moss new to Britain, which was found by him upon St. Vincent's Rocks, 

 Bristol. The foliage is not distinguishable from that of Grimmia pulvinata ; the cap- 

 sule however is abundantly distinct, being globose instead of ovate, and having a co- 

 nical instead of a rostrate operculum. Both species grow upon St. Vincent's Rocks, 

 and are sometimes intenuingled, but each retains its peculiar characteristics, so that 

 Grimmia orbicularis cannot be considered a variety of G. pulvinata. Specimens of the 

 former species accompanied the paper. 



Read also, a paper from Mr. T. Beesley, being " Additions to the List of Plants 

 found in the neighbourhood of Banbury, Oxfordshire, in 1842.'' 



March, 17. — J. E. Gray, Esq., F.R.S. , ike. President, in the chair. Mr. David 

 Moore, of the Royal Botanic Garden, Dublin, presented a specimen of Carcx paradoxw 



