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one pair of parents.  The raising of various known clutches of eggs and genetic studies are called for.

d. The species of these ground finches, which approximate about forty in number, distributed into one or five genera according to the authority followed, should be carefully studied.  The various species tend to be more or less repeated on several islands.  The origin of this family itself is shrouded in obscurity.  Precipitin tests on the blood of the several species of Geospizas and on the supposed mainland or other island relatives might yield significant results.

e. Similar blood tests should be made on the geckos, lizards, snakes, and tortoises inhabiting the islands and on related species on the mainland or elsewhere in the world where closely related forms are known to occur.  As with the Geospizas, these precipitin tests might throw some light on the relationships and the relative age or descent trends of the various species or varieties and, through them, perhaps also on the relative age of the various islands.

f. Botanists could suggest a whole host of similar and other problems crying for investigation.  In this connection, it might be mentioned that the most northerly island of the group, Culpelper, which is about a mile in diameter and a sheer, precipitous rock, approximately five hundred feet in height, has never been scaled.  The at present inaccessible plateau which forms this island is the one virgin bit of unexplored land yet remaining in the Islands.