APPENDIX. No. V. 485 



The whole number of species in tlie collection is about 620 ; but as spe- 

 cimens of about thirty of these are so imperfect as not tu be referable to 

 their proper genera, and some of them not even to natural orders, its amount 

 may be stated at .590 species. 



Of these about 250 are absolutely new : nearly an equal number exist also 

 ill different parts of the west coast of equinoctial Africa, and not in other 

 countries ; of which, however, the greater part are yet unpublished : and 

 about 70 are common to other intratropical regions. 



Of im published genera there are 32 in the collection ; twelve of which are 

 absolutely new, and three, though observed in other parts of this coast of 

 equinoctial Africa, had not been found before in a state sufficiently perfect, 

 to ascertain their structure ; ten belong to different parts of the same line of 

 coast ; and seven are common to other countries. 



No natural order, absolutely new, exists in the herbai'ium ; nor has any 

 family been found peculiar to equinoctial Afiica. 



The extent of Professor Smith's herbarium proves not only the zeal and 

 activity of my lamented friend, but also his great acquirements in that branch 

 of science, which was his more particular province, and to his excessive exer- 

 tions in the investigation of which he fell a victim, in the ill-fated expedition to 

 Congo. 



Had he returned to Europe, he would assuredly have given a far more 

 complete and generally interesting account of his discoveries than what is 

 here attempted: and the numerous facts which he could no doubt have com- 

 municated respecting the habit, the structure, and the uses of the more impor- 

 tant and remarkable plants, woidd probably have determined him to have 

 followed a very different plan from that adopted in tlie present essay. 



It remains only that I should notice the exemplary diligence of the Botanic 

 Gardener, Mr. David Lockhart, the only survivor, I believe, of the party by 

 whom the river above the falls was examined, in that disastrous journey which 

 proved fatal to the expedition. 



From Mr. Lockhart I have received valuable information concerning many 

 of the specimens contained in the herbarium, and also respecting the escident 

 plants observed on the banks of the Congo. 



