BY CHARLES IIEDLEV. 417 



Barbadoes, has been rediscovered at Funafuti.* Six medusa? are 

 noted as common to Fiji and the West Indies.! Darwin wrote 

 that "not one single sea-shell is known to be common to the 

 Pacific and to the west coast of Amei-ica," but the statement is 

 no longer true. 



A list of the Polynesian fauna which reappear on the west coast 

 of America would be of value. Materials are at present wanting 

 to construct it, but it is evident that tlie proportion is small. 

 Their extension eastwards is obstructed partly by the large expanse 

 of water unbroken by islands, and partly by the cold current 

 which flows northwards along the American coast. 



No sign of an American immigration can be traced in the 

 Central Pacific. Had the Trans-Pacific Jurassic Continent 

 advocated by such writers as Hutton and Baur any foundation 

 in fact, then, if not terrestrial, at any rate marine forms should 

 now extend eastwards from America along its former site. 



* Hiles— Proc. Zool. Soc. 1899, p. 48. 

 t Agassiz and Mayer — Bull. Mus. Comp. Zool. xxxii. 1899, p. 158. 



