436 Linnean Society. [June 19, 



June 19. 



William Yarrell, Esq., V.P., in the Chair. 



Mr. Bentley, F.L.S., exhibited a large number of different fibres 

 used for the manufacture of Paper, together with samples of the 

 paper made from them ; and gave some account of the peculiarities of 

 the several materials exhibited, and of the papers manufactured from 

 them. 



Dr. Seemann, F.L.S., exhibited crystals and cakes, constituting 

 an organic new acid, extracted from the root of the Pipitzahuac 

 {Dumerilia Alamani, DeCand., Perezia fruticosa, La LI. et Lexarza) 

 by Mr. William Schaffner and Professor Leopoldo Rio de la Loza, 

 in Mexico, which has received among the Mexican naturalists, on 

 account of its resemblance to gold, the name of " Oro Vegetal," or 

 Vegetable Gold. The acid possesses medicinal properties similar to 

 those of jalapi and is soluble in aether. Dr. Seemann had received 

 the specimens and detailed accounts (not written in English) only 

 two days previous, and was therefore unable to prepare a full 

 description of the plant, its synonyms and properties, for this 

 meeting, but he proposes to do so in time for the next. 



Read, a continuation of Dr. J. D. Hooker's Memoir on " Balano- 

 phorea." 



Read also, a Memoir " On the Larvae of Coleopterous Insects,"' 

 by J. O. Westwood, Esq., F.L.S. &c. In this paper descriptions 

 and figures were given of the larvae of numerous species of Coleoptera 

 of various families. 



