474 



DAVID M. DAVIS 



the type of g^nad present. The external genitals are undifferentiated, or 

 show characteristics of tjie sex opposite to that of the gonad. The tertiary 

 sexual characteristics, such as voice, character, hair development, fat de- 

 velopment, etc., commonly approach those of the 'opposite sex. The gonads 

 are usually without function, and become atrophic, though libido may 

 occur, leading sometimes, where anatomical conditions allow, to relations 

 with persons of both sexes. In masculine pseudohermaphroditism the 

 testes ordinarily remain in the inguinal canal or abdomen, where they 

 undergo the changes usual to cryptorchid testes (see below). 



Anomalies of Formation 



Fusion of the testes is normal in myxinoids and most of the batrachi- 

 ans. One case has been reported in a human being. 



Multiplicity of the 

 testes has been reported, 

 but the cases are doubtful. 

 Two testes on one side, 

 with none on the other, are 

 described. 



Absence of part of the 

 genital tract. No un- 

 doubted case of bilateral 

 anorchia has been reported. 

 In so-called unilateral an- 

 orchia there is usually a 

 fibrous remnant which 

 probably represents an 

 atrophy. The epididymis, 

 with, usually, a part of the 

 vas deferens, may be miss- 

 ing. The writer observed 

 a rabbit in which epididy- 

 mis, vas deferens, and 

 seminal vesicle were ab- 

 sent on one side. The cor- 



Fig. 1. Interstitial ceil hypertrophy, low power. Desponding testicle 

 The topography of the hyperplasia, with arrangement 

 in very large groups, can be seen. (After Diirck. See 

 references. ) 



was 



normal in size and appear- 

 ance. Complete unilater- 



al absence of testis, 

 epididymis and vas deferens is somewhat more common. In all these 

 anomalies, the left side is about twice as apt to be involved as the right. 

 They are very rare, not more than fifty cases being reported in the litera- 

 ture. 



