: r?9 
#' 3 <? 
U i 
UHK! 
THE 
INFERIOR SURFACE 
OF THE 
TRILOBITE. 
The anatomical structure and physiological 
history of the whole family of the trilobites 
not only involved in great obscurity, but we 
can scarcely hope that the most persevering 
efforts of the naturalist will ever be able to 
penetrate the darkness, or unravel the myste¬ 
ries, which involve the subject. No depart¬ 
ment in the science of organic remains has 
been pursued of late with more zeal and 
curiosity than this- The trilobite furnishes 
the earliest example of an articulated animal 
found among the ancient inhabitants of our 
globe, and though in some few existing genera 
we find certain points of analogy in their or¬ 
ganization, the whole race probably became 
extinct after the subsidence of the great coal 
: 1867 lb 
