177 



Guppy Reprint 



29 



Page 150 



formation a new genus of shells under the name of Barettia. 

 Some corals have also been enumerated by Dr. Duncan. 



%2. The Atlantis Theory. 



My present limits will not admit of my going at any 

 great length into the conclusions arrived at from the 

 researches which have been made into the geology of the 

 West Indies. After having therefore briefly touched upon 

 some of the points alluded to in the first part of this paper 

 I shall conclude with a list of the species of the molluska, 

 articulata, echinodermata and protozoa described from the 

 tertiary rocks, showing in what localities the species are 

 found. The columns of the table are arranged in the pre- 

 sumed order of the antiquity of the deposits occurring in 

 the localities. 



The most remarkable perhaps of the results of the inves- 

 tigations referred to in the close alliance exhibited between 

 the fauna of the Caribean miocene and that of the Euro- 

 pean beds of Malta, Bordeaux, Dax, Vienna, and Pied- 

 mont, and with the existing fauna of the Eastern Seas. 

 According to the ideas entertained by the most advanced 

 naturalists of the present day, this close alliance must be 

 accounted for by a migration of species accompanied by a 

 modification of their forms. But as land is as necessary 

 for the migration of most marine animals as it is for terres- 

 trial beings it follows that there must have been land 011 

 areas now occupied by the ocean. 



Heer had advocated the theory of a miocene atlantis, 

 basing his conclusions on his investigations of the miocene 

 flora of Switzerland. That flora exhibits a remarkable 



