177 
Guppy Reprint 
29 
l^age 150 
formation a new genus of shells under the name of Barettia. 
Some corals have also been enumerated by Ur. Duncan. 
;?2. The Atlantis Theory. 
Mj' present limits will not admit of my going at any 
great length into the conclu-sions arrived at from the 
researches which have been made into the geology of the 
We.st 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 sjiecies 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 inve,s- 
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 Ea.stern Seas. 
According to the ideas entertained by the most advanced 
naturali.sts of the present da}’, this clo.se alliance must be 
accounted for b}' a migration of species accompanied by a 
modification of their forms. But as land is as neces.sary 
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 
