IMS 



GEORGE W. CORNER 



modification of the Golgi-Holmgren intracellular apparatus. 

 This view I have had to discard as a result of work which had 

 led to the correct interpretation (Corner, '17 a, b). The spher- 

 ules are due to the presence of a lipoid, probably of phosphatid 

 nature, which is sufficiently oily to round up in the presence 

 of water. The round droplets thus produced usually surround 

 the preexisting globules of neutral fat present in consider- 



,*<"- yth. I C.Z 





r?^.. 



wo. 



« 9 



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4h I. c.z 





Fig. 1 Cells of corpus luteum of pregnant sow (foetuses 100 mm. long), 

 showing spaces in cytoplasm. Mallory's connective-tissue stain. Formol fix- 

 ation. X 810. 



Fig. 2 Cells of corpus luteum of pregnant sow (embryos 20 mm. long). For- 

 mol fixation. Mallory's connective-tissue stain. X 810. r, vacuoles in lutein 

 cell; th.l.c.l, theca lutein cell, type 1; th.l.c.2, theca lutein cell, type 2. 



Fig. 3 Cells of corpus luteum of pregnant sow (embryos 20 mm. long). For- 

 mol fixation followed by osmium tetroxide. X 810. 



