86 NOTICES OF BOOKS. 



? Achyranthes argentea, var. Vinca rosea, Z< ? Canavalia obtusifolia. 



9> 



5,virgata,^o^. Ipomoea Pes-capree, Br, Clitoria Ternatea, Z, 



?Desnioditimtrifloruin,DC ? „ tuberculata, B. ^^ &/. ? Phyllautlxus Niriiri, i. 

 Abrus precutorias, L. ? Batatas pentaphy 11a, CAo/^yy? Eleusioe Indica^ Garin. 



Parkinsonia aculeata, Z. ? „ paniculata, Chouy, ? Dactyloctenium mucrona- 

 Acacia Farnesianaj Willd, Heliophytum Indicum, DO, turn, Willd, 

 Guilandiua Bonduc, L, Physalis angulata. Cenchrus echiuatus, J. 



2, Species probably transported from Africa to America^ or vice versa, but -which 



are not found in Asia or Australia, 



? Sida rhombifolia, Z. Bideas leucantha, Willd. Altemanthera Achyrantha, 



? Urena Americana, Z. ? Schwenkia AmericaBa, Z. Br, 



Triumfetta Lappula, Z. ? Capraria biflora, Z. Iresine vennieularis, Mog. 



^i 



rhomboidea, Jix*?^. Chrysobalanus Icaco, Z. „ aggregata, Moq^, 



Drepanocarpu3lcuiatus,JZ?y. ? Hyptis atrorubens, Poit, Boerbaavia paniculata, Rich, 

 Ecastaphyll. Brownei; Pers, ? „ obtusifolia, Br, Commelyna agraria, Kunth, 

 Mucuna urens, BC. ? Cbenopodium foetidum, Remirea maritima, Axthl, 



Scbranckia leptocarpa, BO, Schrad, ? Sporobolus Virginicus, JT/A. 



Mimosa asperata, L, Telanthera fnitescens, 3Ioq, ? Stenotaphrum America- 



Desraodium incanum, BO, „ maritima, Moq,, num, Schrank, 



13 



tortuosum,D<7. „ var. a. Poa ciliaris, Z. 



Cassia obtusifolia, Z, 



.3. H'opical Species, now common to America and Asia, or to the Islands of the 



Pacific, and probably transported thither, 



Tribulus cistoides, Z. Quamoclit vulgaris, Choisy. Gomphrena globosa, Z. 



Tephrosia piscatoria, Pers, Hyptis capitata, Jacq. Pisonia aculeata, Z. 



Poinciana pulcherrima, Z, „ spicata, Poit, Mirabilis Jalapa, Z. 



Asclepias Curassavica, L. „ suavolens, Poit, „ diehotoma, L, 



? Ipomcea Pes-tigridis, Z. 



The following are the conclusions derived from the above, and other 

 facts of the same kind, cited by the author : 



1. The Old World has received more species from the New than 



vice versa. This appears to be owing to the easterly direction of the 



great currents between America and Africa, and between Africa and 

 India, 



2. The total number of species thus transported is absolutely insig- 

 nificant, compared with the whole extent of the tropical Floras. 



3. The majority of naturalized species appear to have been trans- 

 ported by man, there not being more than 15 or 20 species that can 

 have been transported by currents. The result indicates that the dis- 

 junction of the Old World from the New preceded the creation of the 



