PREFACE. 
8 * 
2. Willemet, ‘ Hortus Mauritianus,’ a duodecimo of 64 pages, pub- 
lished at Leipsic, after the death of the author, in 1796, with a preface 
by Professor Millin. Willemet was a native of Nancy, and was born 
in 1762. He visited the island about 1790, and made a small collection, 
but in the absence of type specimens it is impossible to recognise 
many of the species from his brief descriptions. 
3. Colonel Bory de Saint Vincent . ‘ Voyage dans les quatres prin- 
cipales lies des Mers d’Afrique, 1801-2,’ three volumes octavo, with 
an atlas in quarto, published at Paris in 1804. Bory de Saint Vincent 
was a native of Agen in France, and was born in 1780. In his nine- 
teenth year he accompanied as naturalist an expedition sent by the 
French government to Australia under the command of Capt. Baudin. 
In consequence of a disagreement with the captain he and several of the 
other officers left the ship at Mauritius, where he was employed for some 
time on the staff of the governor in surveying the French possessions in 
that part of the world. His principal attention was directed to 
Bourbon, of which he constructed an excellent map. After his return 
to Europe he saw much service both as a naturalist and a soldier, and 
highly distinguished himself. He died in 1846. 
4. Chevalier Aubert du Petit Thouars. Two works entitled respec- 
tively ‘ Histoire des Vegetaux recueillis sur les iles de France, la 
Reunion, et de Madagascar,” a quarto of 48 pages with 10 plates, pub- 
lished along with a paper on Cycas, at Paris in 1804, and again with 
considerable additions (80 pages and 24 plates) in 1805 ; and ‘ His- 
toire particuliere des plantes Orchidees recueillis sur les trois lies aus- 
trales d’Afrique, de France, de^Bourbon, et de Madagascar,” an octavo 
of 32 pages and 110 plates, published at Paris in 1822. The second of 
these is a monograph of the Orchids of the Mascarene group, with 
figures of each species, and the first contains descriptions and figures 
of several of the most curious endemic Mascarene genera. Besides 
these, Du Petit Thouars made a large general collection in Mauritius, 
which, like that of Commerson, was distributed to various herbaria, 
especially that of Willdenow at Berlin, but never fully reported 
upon. 
5. Carmichael. A small collection made by Capt. Carmichael, F.L.S., 
the monographer of the island of Tristan d’Acunha. This collection 
contains several species and varieties I have not elsewhere seen, but 
unfortunately they are not specially localised. Carmichael was an 
officer of the 73rd regiment of the British Army. He came to Mauri- 
