32 Remarks on the Trilobite. 



ness of perfect adaptation to the uses and condition of the class 

 of creatures, to which this kind of eye has ever been, and is still 

 appropriate. 



" If we should discover a microscope, or telescope, in the hand 

 of an Egyptian mummy, or beneath the ruins of Herculaneum. it 

 would be impossible to deny that a knowledge of the principles 

 of optics existed in the mind by which such an instrument has 

 been contrived. The same inference follows, but with cumula- 

 tive force, when we see nearly four hundred microscopic lenses 

 set side by side, in the compound eye of a fossil trilobite ; and 

 the weight of the argument is multiplied a thousand fold, when 

 we look to the infinite variety of adaptations by which similar 

 instruments have been modified, through endless genera and spe- 

 cies, from the long lost trilobites, of the transition strata, through 

 the extinct crustaceans of the secondary and tertiary formations, 

 and thence onward throughout existing crustaceans, and the 

 countless hosts of living insects. 



" It appears impossible to resist the conclusions as to unity of 

 design in a common Author, which are thus attested by such cu- 

 mulative evidences of Creative Intelligence and Power ; both, as 

 infinitely surpassing the most exalted faculties of the human 

 mind, as the mechanisms of the natural world, when magnified 

 by the highest microscopes, are foiuid to transcend the most per- 

 fect productions of human art." 



We now proceed to the more immediate object of this commu- 

 nication, which is to describe a portion of the under side of the 

 fossil animal, which we have named in our monograph calymene 

 bufo. 



Some time since, my attention was directed by Dr. J. J. Cohen, 

 of Baltimore, to a number of fragments of the heads of this spe- 

 cies, obtained from the vicinity of Berkley, Va., and which are 

 still preserved in his cabinet. Three or four of these fragments 

 seemed to disclose the configuration of the whole lower surface 

 of the buckler, in a more or less perfect state. Within a fev/ 

 months, another friend brought for my examination, a fine large 

 head of the same species, from the same localit)^, and which ex- 

 hibited the under side or thorax, in quite a perfect state of pre- 

 servation. All the fragments have precisely the same structure, so 

 that there can be no doubt, we have now the external configura- 

 tion of the entire head or buckler of the calymene bufo. 



