1 60 Linnean Society. [Dec. 20, 



rhomboidege, inffiquilaterales, impar creniilata incisa, omnes obtusae 

 oi^Mseque creniilatas. 

 A. PetrarcJiee, frondes erecto-patulce, glanduloso-villosce, impari-pinnatse ; 

 stipes obscure nigrescens, supra applanato-canaliculatus, inappendicu- 

 latus ; pinnulee mediae ohlongce basi oblique truncatse vel cuneatce et 

 inde valde inaequilatei-ales, pinnatifidae, lobulis obtusis insequaliter cre- 

 nulatis, superiores supra rachin decurrentes. 



December 6. 



E. Forster, Esq., V.P., in the Chair. 

 William Roden, Esq., was elected a Fellow. 



Mr. Lovell Reeve, A.L.S., exhibited a fine specimen preserved in 

 spirit of the animal of Panopma Aldrovandi, one of the largest of 

 Acephalous Mollusca. 



Read a portion of " An Essay on the Distribution, Vitality, Struc- 

 ture, Modes of Growth and Reproduction, and Uses of the Fresh- 

 water Conferva." By Arthur Hill Hassall, Esq. Communicated by 

 the Secretary. 



December 20. 



E. Forster, Esq., V.P., in the Chair. . 



A. H. Hassall, Esq., exhibited an Apple in which decay had been 

 artificially induced by inoculating it with decayed matter from another 

 apple containing filaments of Entophytal Fungi. 



Read a continuation of Mr. Hassall's memoir on the Freshwater 

 Confervas. 



Read also " Some further Observations on the Nature of the Ergot 

 of Grasses." By Edwin John Quekett, Esq., F.L.S. 



