682 A MANUAL OF ANATOMY 



Testis. — ^The testis is suspended obliquely by the spermatic cord 

 in its scrotal compartment, to the bottom of which it is loosely 

 attached by the fibrous remains of the gubernaculum testis. The 

 left testis is a little lower than the right. The organ is oval, and 

 compressed from side to side. Its exterior, which is smooth, is 

 closely invested by the visceral layer of the tunica vaginalis, except 

 where the constituents of the cord enter or leave the organ. The 

 surfaces are external and internal, the former looking slightly back- 

 wards, and the latter forwards. The extremities are superior and 

 inferior, the former being inclined forwards, and the latter back- 

 waids. The borders are anterior and posterior. The anterior 

 border looks slightly downwards and oiitwards, and is free. The 

 posterior border looks upwards and inwards, and is attached. The 

 average weight of the testis is about 7 drachm ',. 



Epididymis. — This is an elongated narrow body, composed of the 

 convolutions of the excretory duct, and lying along the posterior 

 border and adjacent portion of the external surface of the testis. 

 its upper extremity, which is above the upper end of the testis, is 

 enlarged, and is called the caput or globus major ; the lower and 

 smaller end is called the tall or globus minor ; and the intervening 

 narrow portion represents the body. The globus major and globus 

 minor are connected to the testis by fibrous tissue, and by a reflec- 

 tion of the tunica vaginalis, the former being further connected to 

 the organ by the efferent ducts. The body, except at its posterior 

 border, is free, being separated from the testis by the digital fossa. 

 The epididymis is almost completely invested by the visceral layer 

 of the tunica vaginalis except at its posterior border, where there 

 is a duplicature of that membrane containing bloodvessels and 

 attaching it to the testis. 



Hydatids of Morgagni. — These are two small pyramidal bodies 

 which are situated on the anterior aspect of the globus major at 

 its lower part, or on the front of the upper end of the testis below 

 the globus major, one of them being pedunculated and the other 

 sessile. Each is composed of connective tissue and bloodvessels, 

 covered by the visceral layer of the tunica vaginalis. The hydatids 

 are vestiges of Miiller's duct. 



These small bodies are two in number. One is pedunculated or 

 stalked, and is situated on the front of the caput epididymis at its 

 lower part. The other hydatid is sessile, and is placed on the upper 

 end of the testis below the caput epididymis. 



Organ of Giraldes or Paradidymis. — ^This organ is situated on 

 the front of the spermatic cord, immediately above the globus major, 

 and under cover of the funicular part of the tunica vaginalis. It 

 consists of a few irregular nodules of convoluted tubules, which 

 are lined with ciliated columnar epithelium. These nodules are 

 remains of the Wolffian body. 



Development. — The organ of Giraldds represents a portion of the caudal 

 part of the Wolffian body. 



