14 ALICE M. BORING AND RAYMOND PEARL 
this organ, there are some interstitial cells loaded with se- 
cretion granules (fig. D) also many streaks of tumor-like 
material. This bird is probably a female arrested in the de- 
velopment of its gonad earlier than 1429. To be sure 
weaeM 
C 
Fig. A Portion of follicle wall from ovary of 1429 (x 570). G, epithelial 
layer; N, nest of lutear cells in theca interna; A, lutear cells containing acido- 
phile granules. 
Fig. B- Portion of stroma of ovary from 1429 showing a few interstitial cells 
loaded with granules (X 570). 
Fig. C Portion of periphery of ovary from 1429, showing the small number 
of interstitial cells present (X 264). 
