REPRODUCTION IN THE DOMESTIC FOWL. 383 



oviduct, though the ovary was distinctly not in ovitlating condi- 

 tion. 1 These cases point strongly to the idea that the mutual 

 interrelationship between ovary and oviduct in birds is very far 

 from being of such a simple character as one would be led to 

 infer from observation of normal specimens. Here, as in other 

 instances, teratology may furnish the clue for the elucidation of a 

 normal physiological process. 



SUMMARY. 



The purpose of this paper is to describe in detail a case of in- 

 complete hermaphroditism in the domestic fowl. It is shown 

 that: 



1. In its external somatic characters the specimen was an 

 antero-posterior gynandromorph. 



2. Internally the bird possessed on the left side a large, 

 lobulated gland in the position and anatomical relations normal 

 to the ovary. There was also a fully developed, normal oviduct, 

 in functional condition on the left side of the body. 



3. On the right side of the body was a small organ in the 

 position and anatomical relations normal to the right testis. At- 

 tached to this organ was a normal epididymis and vas deferens 

 leading to the cloaca. 



4. Microscopical examination showed that both sex glands 

 were in a condition of extreme degeneration. Neither spermato- 

 genesis or oogenesis could be found in any part of either gland. 



5. Certain theoretical aspects of the case are discussed. 



1 These authors did, in these cases, succeed in finding some evidence of actual 

 oogenesis, but not of ovulation, either past or prospective. 



