ON THE ORIGIN OF DOUBLE-YOLKED EGGS. l8l 



the granulosa of the outer follicle and the connective tissue 

 covering of the inner one. In this case, too, dissection clearly 

 exposes the compound nature of the suspensorium. C, d, and e 

 represent stages of fusion less complete than the preceding. 



If the suggestions made by these follicles and suspensoria 

 are really correct it ought to be possible to find small follicles 

 not only in places where they are not obvious, but also at various 

 levels of the suspensoria, and this has actually been done. For 

 instance, a, prior to dissection, was not obviously double. / is 



a 



FIG. 2. Dissection of compound follicle, a, a", and a'". Fig. i. Natural size. In 

 this figure a'" is omitted. The suspensorium of a" has been opened and an additional 

 follicle a lv is exposed. The pore, p, establishes a communication between the 

 follicular cavity of a 11 and o iv . 



not simple and somewhat distorted, but double, one follicle 

 being considerably larger than the other; i is triple, having a 

 central follicle, 2, and two equal-sized smaller ones, i and 3. 

 The one on the right, 3, communicates with 2 by means of a small 

 irregular aperture. No opening connects I and 2. In both i 

 and j the suspensoria appear to be united, and there seems no 

 way of explaining how the extra follicles got into their present 

 position, than by assuming that the same process brought them 

 there that carried the main follicle away from the ovary. 



Most illuminating in this connection is the presence of acces- 

 sory follicles on the suspensoria. Sometimes these are large 

 enough to be easily seen, as in the case of a'", of/", attached to 

 the neck of/, a large empty double follicle, and of g" ; occasionally 



