2 
Dictionaries, &., the most comprehensive being that by Decaisne in 
volume 8 of De Candolle’s ‘ Prodromus,’ published in 1844. Finally, in : 
Bentham and Hooker’s ‘ Genera Plantarum,’ the genera are dealt with — 
as a whole and redescribed; most of those proposed by Haworth being 
reduced both by Decaisne and Bentham and Hooker to the rank of 
sections of Stapelia. 3 
ome twenty years ago, when I commenced to study this group and 
me 
knowledge em has increased, chiefly by means of the splendid 
collection sent by Sir Henry Barkly, so have I found that the 
