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Still earlier period was probably connected with Central America. 
By the subsidence of this large island the small islands originated. 
There is no place in the world where variation can be studied bet- 
ter than here. 
Case 1. — Shows the variation of the birds on the different 
islands. Nesominens, for instance, has a peculiar representative 
on Hood, Chatham, Albemarle, Abingdon, Tower, Charles; the 
more central islands. Indefatigable, James, Jervis, having a com- 
mon representative. The same is true for Certhidia, which shows 
also different species on the different islands. 
Case 2. — Shows the variation of the Lizard Tropidurus. 
Nearly every island has developed a peculiar race or species; and 
exactly as in the Bird mentioned. There is never more than one 
race or species found on one island. 
Cases 3, 4, and. 5. — Exhibit the Birds found on the 
Islands. Those which do not occur elsewhere are specially la- 
beled. Among these may be specially noticed a fine series of 
Creagrus furcatuSy Neboux, a gull exceedingly rare in collections, 
and the peculiar Penguin Sphenisctts mendiculuSy Sunder. 
Case 6. — Contains the Orthoptera, Trachnids, Mollusks, and 
other Invertebrates. 
