236 Darwin, and after Darwin. 
I have called into evidence, those that are at once 
the most isolated and give independent proofs of the 
highest antiquity, are the Galapagos Islands, the Sand- 
wich Islands, and St. Helena. Now, if we apply the 
method of tabular analysis to these three cases, we 
obtain the following most astonishing results, For 
the sake of simplicity I will omit the enumeration of 
peculiar genera, and confine attention to peculiar 
species. Moreover, I will consider only terrestrial 
animals ; for, as we have already seen, aquatic animals 
are so much more likely to reach oceanic islands that 
they do not furnish nearly so fair a test of the evolu- 
tionary hypothesis. 
PECULIAR SPECIES. 
Shells. Insects. | Reptiles. | Birds. | Mammals, 
Sandwich . 400 1 2 16 ° 
Galapagos 15 35 10 30 ° 
St. Helena 20 128 ° 1 ° 
Totals 435 163 12 47 ° 
NON-PECULIAR SPECIES. 
Shells. | Insects. | Repeats. Birds. | Mammals. 
Sandwich . ° 2 ° ° ° 
| Galapagos H 2 ° I ° 
St. Helena ° 2 ° ° ° 
Totals . ° | 2 ° I ° 
From this synopsis we perceive that out of a total 
of 658 species of terrestrial an'mals known to inhabit 
