150 PROCEEDINGS OF THE SCIENTIFIC ASSOCIATION. 
formation a new genus of shells under the name of Barettih . 
Some corals have also been enumerated by Dr. Duncan. 
§2. The Atlantis Theory. 
, ify 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 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 is 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 on 
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 
