1 84 OTTO GLASER. 



same group. How this can be is answerable by assuming that 

 the vascular supply to the two groups was different, whereas to 

 the individual members of each group it was practically the 

 same. The physical basis for this might easily be found in the 

 character of the fusion undergone by the individual suspensoria, 

 for if this should be such as to partially occlude the flow of blood 

 in certain directions, the follicles supplied by the vessels involved 

 would lag behind those furnished with a better supply. That 

 the blood supply to certain follicles must be affected, is clearly 

 shown by the suspensoria which are reduced to mere threads. 



In certain instances, however, a follicle despite its reduced 

 suspensorium is practically as large as the neighbor to which it 

 is attached, as in the case of e". This suggests the establishment 

 of a secondary blood supply derived from the better equipped 

 follicle. The highly vascular condition of the connective tissue 

 between the granulosae certainly is favorable to this interpre- 

 tation. In fact in view of the structural relations it is difficult 

 to see how the blood supply could be otherwise than identical 

 in this case. 



Identity of vascularization makes another fact understandable. 

 A follicle such as c" would under normal conditions have a blood 

 supply much less than that of its "host" c. As it probably is 

 dependent on that of c, however, owing to its intimate fusion 

 with it, and the reduction to almost nothing of its own sus- 

 pensorium, it is likely to have more material brought to it than 

 it can metabolize in normal fashion. This follicle, as well as 

 others of its size similarly placed, showed considerable depo- 

 sitions of yolk in the lacunae of their hypertrophied granulosae. 



This fact is not only suggestive as to the r61e played by the 

 granulosa during oogenesis, but also of the part of the egg itself 

 in initiating the deposition of yolk, for if the ovum in this instance 

 is not supposed to have been less permeable to the raw materials 

 of yolk than the one in the larger follicle, where only traces of 

 yolk could be found in the granulosa, it is difficult to see why the 

 two eggs should have been unequal in size. There must be a 

 period in the ovarian life of an egg when its permeability to 

 certain substances is suddenly greatly increased. Riddle's 

 work ('n) suggests the same thought, but this abnormal ovary 



