OF RUBIACEiE IN TROPICAL ArRICA. 249 



ings of the Order in this region and comparing tlie more remark- 

 able points here with those in other parts of the world, is to be 

 found in the fifth volume of the Memoirs of the Society of Natural 

 History of Paris, from the pen of Mons. A. Eichard. This is a 

 memoir on RubiacesR, and contains a general description of the 

 family for the whole world and the characters of the genera which 

 compose it. The paper was read before the Royal Academy of 

 Sciences of Paris on July 7, 1829, and was printed in the year 1829 



*^ or not later thanl830,but was not actually published until the year 



1834 ; on pages 116-118 he gives a special account of the geo- 

 graphical distribution and general characters with the predominant 

 genera of Rubiacese in the middle or intertropical region of Africa. 

 Only a small proportion, however, of the species which are now 

 known to occur in Tropical Africa appear to have been known to 

 Richard. The genera of Eubiaceae, as well for Tropical Africa as 

 for the rest of the world, have been latterly set in order and de- 

 scribed in the first part of the second volume of Bentham and 

 Hooker's * Genera Plantarum,' published in the year 1873. The 

 new genera, described for the first time therein, have been all cre- 



V dited to Sir J. D. Hooker, with the exception of two genera, 



which have been taken up from Welwitsch's manuscripts. This 



. work has been for the most part folloAved by me for the purposes 



of classification ; the few departures that I have felt obliged to 



make from this main guide to the Order are not necessary to 



detail in this place. 



Having recently drawn up descriptions of the plants of this 

 Order for the third volume of the ' Flora of Tropical Africa,' this 

 portion of the volume having already been printed off*, I propose 

 to lay before the Society a general sketch of the principal results, 

 and to give at the same time some particulars which the plan of 

 the * Flora ' does neither require nor allow. 



There are described in the ' Flora ' 478 species arranged under 

 80 genera, besides a species of Vaillaniia and a few species which 

 are either imperfectly known or only incidentally mentioned. To 

 this number must also be added one old aud two new species 

 (which are herein described and figured), but which I was not 

 acquainted with in time to include them in the volume, aud also 

 a considerable number of new species collected by Welwitsch in 

 Lower Guinea, most of which, though seen by me, it has been 

 found impossible to include. When these additions have been 

 made, it will result that the species of Eubiace® already in our 



