(\ J. Bond 209 



Brandt {ZeitschHft filr tuiss. ZooL, Vol. XLViii, 1889, page 101). Weber 

 quoted by Biedl mentions the case of a bird (a chaffinch) with right sided 

 male and left sided female plumage in which a testis was found on the 

 right side and an ovary on the left side of the body. Virchow (also 

 quoted by Biedl) records the case of a human pseudo-hermaphrodite, in 

 whom a left sided anomaly of the sex gland wjis ass(x;iated with im- 

 perfect growth and development on the left side of the body. There 

 is in the Royal College of Surgeons Museum a butterfly (one of the 

 Blues) with male wing pattern on one side and female on the other, 

 but I am not aware that any microscopical examination of the gonads 

 has been made in this case. 



Heinrich Poll ("Zur Lehre von den Sekundaren Sexual Characteren," 

 Stzgsber. Ges. Naturf. Freunde zu Berlin, 1909), refers to three cases 

 of true hermaphrtxlitism associated with a hemilateral distribution of 

 secondary sex charactei's in birds. He gives a full and careful descrip- 

 tion of a bullfinch in which the plumage of the breast was male in 

 character on the right side and female on the left, and this hemilateral 

 distribution of secondary sex charactei-s was associated with a double 

 sex organ, testicular or male on the right side and ovarian or female on 

 the left side of the body. Poll directs attention to the suggestive 

 fact that in true hermaphrodite birds with hemilateral secondary sex 

 characters the male character occurs on the right side of the body, 

 the side on which the sex gland is also male. He suggests that the 

 presence of the testis on the right side may be associated with the 

 atrophy of the right sex gland which normally occurs in birds. 



In the case of the Pheasant here described however, the male 

 characters are present on the left side of the body, while the male and 

 female elements are gathered together in one single sex gland which lies 

 on the left side but nearer to the middle line than usual. 



Among the Invertebrata, especially the Lepidoptera, abnormal 

 examples of hermaphroditism occur somewhat frequently. In such 

 cases the jtssociation between the relative position of the internal sex 

 gland and the distribution of the secondary sex characters is not how- 

 ever apparently so close as in bii-ds. 



Thus while true Hermaphrodites do rarely occur in which male 

 secondar\' characters are present with a male sex gland on one side of 

 the body, and female secondary characters with a female sex gland on the 

 opposite side, there are still reasons for thinking that the localization of 

 sex gland and sex character in different halves of the body both have a 

 common genetic cause, and are not causally related the one to the other. 



