THE FEMALE REPRODUCTRT ORGANS 9 



as contributing clumps of cells to the corpus luteum. These 

 cells, the theca-lutein cells of Corner and para-lutein cells of 

 Gatenby, while clearly distinguishable from the true lutein cells, 

 are of the same general type and appear to be definitely of a 

 secretory nature. This type of corpus luteum has been described 

 in the sow by Corner (122), in Platypus by Hill and Gatenby 

 (299) and in the human by Gatenby (237) and by Shaw (560). 



t.m.g : — - "^ •' 







Fig. 4. — Human Corpus Luteum. 



t.m.g. tissue derived from membrana granulosa; t.t.i. tissue 

 derived from theca interna (after Shaw). 



In such circumstances, therefore, there is some histological 

 basis for supposing the corpus luteum to have a dual secretion. 

 In certain animals, notably the cow, many of the corpora 

 lutea are hollow and contain a viscous fluid. Some workers have 

 considered them to be cystic. Allen in the mouse (6) and 

 Hammond in the cow (265), however, found that the secretion 

 of liquor folliculi goes on temporarily after ovulation, and if not 

 completely reabsorbed by the developing corpus luteum, the 

 fluid remains in a central cavity. This inclusion of follicular 

 secretion is important from the point of view of extraction 

 of the corpus luteum (see p. 107). 



