PREl'-A CE. 
9 * 
tius from the Cape in 1810, and also visited Bourbon. He died 
in 182(5. 
6. Sieber. Two sets of dried specimens, gathered with Zeyher in 
1822-1823. Many sets were gathered and the collection is distributed 
widely in herbaria. It is often cited in J)e Candolle’s Prodromus 
and general monographs, but it contains a great many introduced plants 
as well as the genuine natives of the island, and as no distinction is 
made between the two, it has led to many species being regarded as 
Mauritian, which are simply taken from gardens there, and have no 
claim to be considered even as naturalised. Sieber collected many 
similar sets of dried specimens in other parts of the world. 
7. Achille Richard. 1 Monographic des Orchidees des lies de France 
et de Bourbon/ 1828, quarto, 83 pages, 11 plates. 
8. Bojer. ‘ Hortus Mauritianus, ou enumeration des plantes exo- 
tiques et indigenes qui croissent a l’ile Maurice,’ an octavo of 456 pages, 
published in Mauritius in 1837. M. Bojer was professor of botany for 
many years at the Royal College of St. Louis, and secretary and curator 
of the Natural History Society, or, as it was afterwards called, the 
Royal Society of Arts and Sciences of Mauritius. He explored the 
botany of the island so thoroughly that he left very little for his 
successors to discover, and this work contains a complete enumeration 
of both the wild and garden plants of the island, with the special locali- 
ties of the former. If Bojer had not drawn with a firm hand more than 
a generation ago the line of demarcation between the indigenous and 
introduced species, it could not have been done satisfactorily now, and 
in this important matter I have every reason to consider him 
thoroughly trustworthy. Unfortunately the book contains names only, 
and he never lived to publish the descriptions of the many new 
species which he named, and, as might be expected, in many cases fell 
into error in identifying plants of Mauritius with those of other coun- 
tries, or more often in supposing species to be new and endemic which 
were known aud already named from other countries. He sent large 
collections to Sir Wm. Hooker, and through the instrumentality of 
Sir H. Barkly the whole herbarium of the Royal Society of Arts and 
Sciences, which he formed, was forwarded to Kew, with permission to 
keep specimens of the duplicates. So that with these and the help 
of Messrs. Bouton and Horne, we know more or less certainly what is 
intended by a great majority of the names used in this work, but there 
are a certain number of which no specimens have been kept, and to 
