368 PROCEEDINGS OF THE ACADEMY OF [1887. 



specify the particular type of metapterygium and over what partic- 

 ular somites it was primarily attached, nor even, indeed, that partic- 

 ular radii, with terminal dichotomous divisions, may not have been 

 equally well adapted to furnish the morphological foundation of the 

 chiro pterygium and the endless variety of terminal modifications of 

 the fore-and-hind-limbs of the higher vertebrates. 



