1871.) 



40T 



[Wilder. 



strong argument in favor of the antitropic relation of the membra may 

 be derived from the manner of their ossification as described and 

 figured by Robin. 1 



Fig. 5. 



I have copied his figures, reversing one of them in order to show the 

 membra in the relative position which they would have when attached 

 to the body, the inside borders (post-armal and pre-skeleal) facing 

 each other. It appears from both the figure and description of Robin, 

 (though he evidently attached no such significance to the fact, and 

 this gives it the greater value for us,) that the long bones of both 

 membra begin to ossify in a strictly untitropic manner, the very shapes 

 of the points of ossification being symmetrically related. If this is 

 the rule with the mammalia, I shall look upon it as a most decided 

 confirmation of the general views advocated in this paper, and would 

 call the attention of embryologists to the statements of Robin, which 

 I have no means of verifying at the present time. 



1 Sur les conditions de l'osteogenie" avec ou sans cartilage prexistant; Journ. de 

 l'Anatomie, Tom. 1, 1864, p. 577, PI. iv. 



