Linncean Society, 461 



Ninth and Tenth Decades of the Third Century of New Exotic 

 Cellular Plants, by Dr. Montagne. The portion of these valuable 

 papers in this Number is occupied by descriptions of the Lichens of 

 Guiana. 



Works just Published. 



Arcana Entomologica ; or, Illustrations of New, Rare, and Interesting 

 Insects. By J. O. Westwood, F.L.S., Sec. Ent. Soc. London, &c. 

 The first volume, containing 48 coloured plates, of this work, which 

 was established with the view of describing and figuring some of the 

 many interesting and splendid novelties with which our entomolo- 

 gical collections have, within the last few years, been so greatly en- 

 riched, is now completed. 



The plates comprise 176 coloured figures, of which nearly 160 are 

 representatives of insects now for the first time given to the scientific 

 world, or of which no previous figures existed. The work is to be 

 continued in each alternate month. 



Manual of British Botany. By Charles C. Babington, M.A., F.L.S., 



F.G.S. &c. 

 Containing generic and specific characters of British plants, in one 

 volume, 12mo, as a travelling companion. 



PROCEEDINGS OF LEARNED SOCIETIES. 



LINNCEAN SOCIETY. 



December 20, 1842.— 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. 



" Some further Observations on the Nature of the Ergot of 

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



This paper contains the results of experiments made by the author 

 with the view of determining the mode in which the sporidia of the 

 fungus which he regards as the cause of Ergot are introduced into 

 the infected grass. 



In March 1840 twelve healthy grains of rye, of wheat and of bar- 

 ley were placed in a shallow glass vessel containing a sufficient 

 quantity of distilled water to moisten them, and covered with a glass 

 shade. When germination commenced an ergot of wheat of the pre- 

 ceding year was immersed in the water, the sporidia on its surface 

 were detached, and the ergot itself was then removed. The same 

 experiment was performed with sporidia obtained from an ergot 

 of Elymus sabulosus. Several days afterwards, when the leaves had 

 attained a length of three or four inches, the young plants were 

 conveyed into the country and planted side by side in a garden. At 

 the period of harvest there remained alive only four plants of the rye 

 (one of which had been infected from the ergot of Elymus, and the 



