124 THREE CRUISES OF THE “ BLAKE.” 
themselves indicate a former land connection any more than the 
presence of the remains of African mammals at Pikermi indi- 
cates a direct communication between Greece and Africa. At 
the time of their greatest development, with a geographical dis- 
tribution extending over Spain, Germany, Asia Minor, Persia, 
and India, the connections between the lands bordering on the 
Mediterranean may not have been materially different from 
what they now are. 
