16 
REPOIIT. 
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,'svell 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 which 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 Rev. C. Cloiiston. 
