XV111 PREFACE. 



instructed quarters of the world ; yet those limited op- 

 portunities have been fruitful in original observations, 

 in translations, in papers, in monographs, and in im- 

 proved editions of preceding works. 



The several productions alluded to in the above 

 sketch, are too numerous for distinct or individual no- 

 tice on the present occasion, they have, however, been 

 freely canvassed for the composition of this work, and 

 their contribution to the general cause of anatomy 

 claimed, to the extent that it could be, keeping at the 

 same time this work within the precincts of what it is 

 intended for, to wit, a Text Book to the course of Lec- 

 tures on Anatomy in the University of Pennsylvania. 

 Some things may, however, be omitted as useless, which 

 strike the understanding of others as too important for 

 neglect; and other things on the ground of having a tes- 

 timony too defective, at present, of their real existence, 

 to justify their being introduced into a code of De- 

 scriptive Anatomy. 



W. E. HORNER, M. D., Univ. Penn. 

 Philadelphia, Oct. 1839. 



