26 
Proceedings of the Royal Society 
After he had completed these great works, Dr G-reville made a, 
special study of the Diatomacese, of which he formed a most valuable 
collection, all the specimens being put upon slides and finely 
labelled. He wrote upwards of twelve papers descriptive of these 
minute organisms. For these papers, and also for his contributions 
to Cryptogamic Botany, the Council of this Society awarded to him, 
in 1862, the medal founded by his friend, Dr Patrick Neill. 
In the brief space to which these biographical notices are neces- 
sarily limited, it would be impossible to enumerate even the large 
number of important papers which Dr G-reville published in the 
Wernerian Transactions, and in the various scientific periodicals of 
the day, and to give an intelligible account of the important facts 
which they contain. We must notice, however, his collections of 
natural history, which are extremely valuable, and not less impor- 
tant to science than the works in which they are described. 
His fine collection of Phanerogamic plants, and of Ferns, Mosses, 
Fungi, and Algae, increased by subsequent purchases, and consisting 
of about 50,000 species, constitutes our University Herbarium in 
the Botanic G-arden. His collection of Insects, purchased also by 
the University, is now deposited in the Museum of Science and Art. 
His great collection of Diatoms has been purchased by the British 
Museum ; and his collection of land and fresh water Mollusca has 
been purchased for the Museum of Science and Art in Edinburgh. 
The value of Dr G-reville’s works has been greatly enhanced by 
the beauty and accuracy of his drawings. His pencil was that of an 
accomplished artist ; and at one time he took up landscape painting 
as a profession, and contributed several paintings to the Exhibitions 
of the Scottish Academy. 
The works of Dr G-reville were as highly appreciated in foreign 
countries as they were in his own. In 1821 he was elected a 
Fellow of this Society. In 1825 he was chosen a Member of the 
Royal Irish Academy, and in 1826 the University of Glasgow con- 
ferred upon him the degree of Doctor of Laws. He was also a 
Fellow of the Linnean Society, and either a corresponding or an 
honorary member of a great number of Natural History Societies in 
Europe and America. 
In his latter years Dr Greville lived happily at his beautiful villa 
of Ormelie, near Edinburgh, where, with some exceptions, his health 
