580 



Harris Hawthorne Wilder 



diverging right and left from the longer crura of the two latter. [Fig. 6.] 

 The details of the separate ossicles are best learned from Figs. 7-9, 

 which represent the synotic ossicles, in most cases accompanied by a 



Fig. 0. Baldwin Synote, Teras III. General view of the double ossicles of 

 the synotic side ; external aspect. This complex was situated within the oval 

 frame formed by the two tympanic bones of this side, Fig. 3 (b). 



Right of A. Right of B. 



Capitulum [ 



Capitulum 

 Right of B. /^'^ Right of A. 



Proc. ant. 1*1 '/ Collum 



Proc. n -^3 M. tens. tymp. 

 lat, "^ ^^ 



Fig. 7. Baldwin Synote, Teras III. 



(a> Double malleus; external aspect. The normal mallmis. taken from the 

 right ear of the perfect face (= A, r) is placed beside It for comparison. 



(b) The same ossicles; internal aspect. Upon the double malleus note the 

 slender median processus anterior [Folii], directed downwards and suggesting 

 the former location in the embryo of a double median Meckel's cartilage. 



Both bones are drawn to the same scale. 



corresponding one from the perfect side, which appears in the case of 

 each bone perfectly normal. In the macerated specimen it was of course 

 impossible to demonstrate the associated soft structures, but by tlie 



