396 GALAPAGOS ARCHIPELAGO. [cHap. xv1t. 
No. of Species 
No. of No. of 
Specie " Species No. eee to the 
Name Total confined |confined| Galapagos 
of No. of found in 
other parts} tothe | to the Archipelago, 
Island. Species.’ ofthe | Galapagos|_ one but found on 
world, Archipelago} Island, Ce ee 
James Island .| 71 33 38 380 8 
AlbemarleIsland| 46 18 26 22 4 
Chatham Island.} 32 16 16 12 4 
Charles Island .| 68 89 29 21 8. 
(or 29, if the 
probably im- 
ported plants 
be subtracted) 
Hence we have the truly wonderful fact, that in James Island, 
of the thirty-eight Galapageian plants, or those found in no 
other part of the world, thirty are exclusively confined to this 
one island; and in Albemarle Island, of the twenty-six abori- 
ginal Galapageian plants, twenty-two are confined to this one 
island, that is, only four are at present known to grow in the 
other islands of the archipelago; and so on, as shown in the 
above table, with the plants from Chatham and Charles Islands. 
This fact will, perhaps, be rendered even more striking, by 
giving a few illustrations :—thus, Scalesia, a remarkable arbo- 
rescent genus of the Composite, is confined to the archipe- 
lago: it has six species; one from Chatham, one from Albe- 
marle, one from Charles Island, two from James Island, and the 
sixth from one of the three latter islands, but it is not known 
from which: not one of these six species grows on any two 
islands. Again, Euphorbia, a mundane or widely distributed 
genus, has here eight species, of which seven are confined to the 
archipelago, and not one found on any two islands: Acalypha 
and Borreria, both mundane genera, have respectively six and 
seven species, none of which have the same species on two islands, 
with the exception of one Borreria, which does occur on two 
islands. The species of the Composite are particularly local ; 
and Dr. Hooker has furnished me with several other most strik- 
ing illustrations of the difference of the species on the different 
