16 REPORT. 



The same liberal donor has augmented the Botanical 

 collection with a choice and extensive Herbarium, rich in 

 rare plants, and containing 2300 specimens ; — and a second 

 Herbarium of similar merit, well illustrated by characteristic 

 varieties, and containing 1780 specimens, having been given 

 to the Society by one of its Members,^ these important 

 contributions, when united and arranged, will form, with 

 those wliich had been before received, an instructive series 

 of no common excellence and extent. 



In the Geological department of Science, many of the 

 specimens which have been presented possess considerable 

 interest. Among those received from foreign countries, the 

 most deserving of notice are the Fossil Shells from Iceland, 

 differing little from the recent Venus Islandica, except in so 

 far as they are entirely converted into spar ; the Shells from 

 Barbuda, identical with those now inhabiting the West 

 Indian seas, but imbedded in a calcareous rock which 

 occupies the centre of the island ; ^ and the specimens from 

 Bohemia,^ of Plastic Clay indurated into Porcelain Jasper, 

 by the combustion, as it should seem, of the subjacent bed. 

 The extensive collection from the rocks of Scotland, with 

 which the Society had before been favoured, has been again 

 augmented ;* and the Geology of the Orkneys has been 

 illustrated by a series of specimens,^ explanatory of a Memoir 

 in which the strata were described. The Mountain Lime- 



• W. Middleton, Esq. * Presented by Capt. O. V. Vernon, 



^ Presented by the Directors of the Museum at Prague. 



* By H. Witham, Esq. M.W.S. * Presented by the Rer. C. Clouston. 



