410 REVIEWS AND BOOK NOTICES. 
is effectually disposed of by the remark that “the organism 
supported through all its tissues on all sides, within and without, 
by incompressible fluids at the same pressure 
The chapter on deep-sea soundings is full in its details and 
illustrations, and it is concluded from what has been accomplished 
n 
is 
99 
Fig. 109, 
Lophohelia prolifera. 
by American and English naval officers, that “the central and 
southern parts of the Atlantic appear to be an old depression, 
probably, at all events coeval with the the deposition of the ju- 
rassic formations of Europe, and throughout these long ages the 
tendency of that great body of water has no doubt been to ameli- 
orate the outlines, softening down asperities by the disintegrating 
