i6 



QUATERCENTENARY STUDIES IN PATHOLOGY 



atrophy, with the result that the lesser curvature of the bulbus is closely 

 applied to the lesser curvature of the ventricle, and the upper orifice of 

 the bulbus is being brought directly in front of, and applied to, the 

 auricular canal (see figure 7, A, B). The lesser curvature becomes rapidly 

 absorbed. 



The changes which result from the complete atrophy of the lesser 

 curvature will be best appreciated by an examination of two diagram- 



Figure 9, (A) Diagrammatic section of the embryonic heart showing the lesser curvature 

 by a black line. 



matic sections of the embryonic mammalian heart which are reproduced 

 in figure 9. In each section the four chambers of the primitive heart are 

 shown ; (i) sinus venosus ; (2) auricle ; (3) ventricle ; (4) bulbus. In A 

 the lesser curvature is represented by a thick black line. The 

 atrophy of the lesser curvature is seen to result in the following 



(70) 



