76 INFLUENCE OF HORMONES 



minute nodule of testicular tissue showing normal 

 spermatogenesis was found on post mortem ex- 

 amination attached to the intestine. In this bird 

 there was no male development of comb or wattles, 

 a full development of neck hackles, a certain develop- 

 ment of saddle hackles, a few straggling badly 

 curved feathers in the tail and short blunt spurs on 

 the legs. Lode^ (1895) found that testes could easily 

 be transplanted into subcutaneous tissue and else- 

 where, and that the male characters then developed 

 normally. Hanau^ (1896) obtained the same result. 

 The question, however, to what degree the male 

 characters of the cock are suppressed after com- 

 plete castration is not so definitely answered in the 

 literature of the subject. Shattock and Seligmann 

 in their 1904 paper make no definite statement on 

 the subject. Rieger (1900), Selheim (1901), and 

 Foges^ (1902) state that the true capon is char- 

 acterised by shrivelling of the comb, wattles, and 

 spurs ; poor development of the neck and tail 

 feathers ; hoarse voice and excessive deposit of fat. 

 Shattock and Seligmann, on the other hand, have 

 placed in the College of Surgeons Museum the head 

 of a Plymouth Rock which was castrated in 1901. 

 It was hatched in the spring of that year. In 

 December 1901 the comb and wattles were very 

 small, the spurs fairly well developed, and the 

 tail had a somewhat masculine appearance. In 

 September 1902, when the bird was killed, the comb 

 and wattles were still poorly developed, the neck 

 hackles fairly well so ; saddle hacldes rather well 



^ Wiener hlin. Wochenschr., 1895. 

 2 Arch. /. ges. Physiologie, 1896. 

 ^ Pfiugers ArcJiiv, 1902. 



