950 OF GENERATION EMBRYONIC DEVELOPMENT. 



extracted from the admirable thesis of Dr. W. M. Banks, 1 gives clearly the 

 origin and homologies of the several parts of the urino-genital system in the 

 two sexes : 



THE WOLFFIAN BODY ITSELF. 



In the Female. In the Male. 



Fragmentary tubes and canalicules clis- Organ of Giraldes and some of the tubules 



posed in the neighborhood of the Par- adhering to excretory duct, forming the 



ovarium. vasa aberrantia. 



NEW STRUCTURE ON SUMMIT OF WOLFFIAN BODY. 

 Parovarium. Globus major. 



MULLER'S DUCTS. 



Ampulla forms the fimbriated end of the Ampulla forms the hydatid of Morgagni. 



Fallopian tube. 

 From ampulla to round ligament forms From ampulla to gubernaculum forms 



the Fallopian tube itself. small cysts running from the hydatid 



of Morgagni down the side of the epi- 

 didymis. 

 From round ligament to genital cord From gubernaculum to genital cord forms 



forms the cornua uteri. cornua of the organ of Weber. 



"When united in genital cord they form When united in genital cord they form 



the uterus and vagina. the organ of Weber. 



EXCRETORY DUCTS OF WOLFFIAN BODIES. 



Gaertncr's canals. Vas deferens, body and globus minor of 



epididymis. 

 Diverticula in them. Broad and sacculated ends of the vasa 



deferentia. 



EXTERNAL ORGANS. 



Clitoris. . Penis. 



Pars intermedia. Corpus spongiosum. 



Labia majora. Scrotum. 



Bulbus vcstibuli. Bulb. 



Labia minora. Cutaneous covering of the urethra. 



SINUS URO-GENITALIS. 



Vcstibulum vaginae. Membranous portion of the urethra, and a 



small part of the prostatic. 



790. Now in a large proportion of cases of so-called H&rmaphrodism, 

 there has been either a want of completeness in the development of the 

 Mule organs, so that they present a greater or less degree of resemblance 

 to those of the female; or the developmental process has gone on to an ab- 

 normal extent in the Female organs, so that they come to present a certain 

 degree of resemblance to those of the male. One of the most common mal- 

 formations of the male organ is " hypospadias," or an abnormal opening of 

 the urethra at the base of the penis, arising from incompleteness in the clos- 

 ure of the edges of its original furrow. But when the developmental pro- 

 cess has been checked at an early period, the uro-genital sinus may retain 



1 Prize Thesis, Edinburgh, 18(34. On the Wolffian Bodies of the Foetus, and their 

 remains in the Adult, including the Development of the Generative System. For 

 the latest observations on Miiller's and the Wolffian ducts, see C. Semper, Ontral- 

 blatt, 1875, p. 466. 



