LUTEAL CELLS IX GOXAD OF PHALAROPE. IO5 



two sexes. That they may have some other endocrine function, 

 in the light of our present knowledge, is to be neither affirmed nor 

 denied. 



CONCLUSIONS. 



A histological study of the gonads of the Northern Phalarope 

 shows that luu-al cells such as are found in the gonads of Sebright 

 Bantams an- .il>H.-nt in the testes and present in the ovaries. 

 Since the fcin.ik- is more brilliantly colored than the male there is 

 no indication that these cells through an internal secretion influ- 

 ence the development of any differences in the color of feathers 

 of the two sexes. 



LITERATURE. 

 Bailey, F. M. 



"17 Handbook"; Birds of tin- Western L'nilcd States. Pp. lii -f- 574, 601 figures. 

 Boring. A. M., and Pearl, R. 



'17 Sex Studies. II. Interstitial cells in the reproductive organs of the 



chicken. Anal. Rec.. 13. 253-268. 6 figs, in text. 

 Boring and Morgan, T. H. 



"18 l.uteal cells and hen-feathering. Journ. Gen. Phys. I, 127-131, 4 figs, in 



text. 

 Nonidez, Jose F. 



'22 Studies on the Gonads of Fowls. III. The origin of the so-called luteal 

 cells in the tcslis of hen-feathered cocks. Am. Jour. Anat.. 31. 109 

 7 figs, in text. 

 Pearl, R. and Boring. A. M. 



'18 Sex Studies. X. The corpus luteurn in the ovary of the domestic fowl. 

 Am. Journ. Anat. 23, 1-36. o pis.. 6 figs, in text. 



