VESICULA PROSTATICA. 



Weberian Organ of the Deer, 

 a, a, vasa deferentia ; b, b, se- 

 minal vesicles ; c, Weberian 

 orfran. 



Weberian Organ of the Goat. 

 seminal ducts ; b, b, seminal vesicles ; c, Weberian organ. 



in the majority of he-goats a less complete 

 development of the Weberian organ occurs. 



According to my observations the organ 

 consists of a cylindrical body, which ascends 

 between the two seminal ducts, and is strongly 

 united to these by areolar tissue, especially 

 in its inferior half. After a course of an inch 

 and a half it splits into two horns, which are 

 apposed to the seminal ducts, and continue 

 \vith these to the testicles, where they pass 

 into the covering of the epididymis. In 

 two instances the lower third of the body 

 was dilated into a longish vesicle of about 

 three lines in diameter, while the part above 

 this measured scarcely one line. At the seat 

 of bifurcation it was again dilated, though 

 less considerably. In one individual the 

 middle portion was obliterated so as to form 

 a solid cord. The point of opening into the 

 uro-genital canal is a small linear fold, which is 

 separated by a short interval from the orifices 

 of the vasa deferentia, and is usually placed 

 below, but, in one instance, above them. 



The genitals examined were those of either 

 new-born individuals, or of such as were 

 but a few weeks old. In two instances, which 

 were in no way distinguished by a special 

 development of the Weberian organ, the uro- 

 genital canal was wider and shorter than 

 normal, measuring from 2 to 2 inches long 

 only, instead of about 4? inches, while the 

 penis was smaller, and twisted into numerous 

 zigzags or spirals. But in other respects the 

 male organs were quite perfectly developed ; 

 the urethra opened at the extremity of the 

 k ^penis, and the testicles had descended into 

 the scrotum. 



In the sheep there is no Weberian organ. 

 Even in the new-born individual, neither its 

 opening nor any other indication of it can be 



found. But in the bullock I found immediately 

 under the orifice of the vasa deferentia a small 

 and scarcely noticeable roundish aperture, 

 through which a probe penetrated about two 

 lines in depth, evidently into the tubular 

 cavity of a small Weberian organ, which was 

 covered by the heart-shaped mass of the pro- 

 state. 



. 881. 



Weberian Organ of the Monodon. 

 Xb verumontanum ; 6, b, orifices of the vasa de- 

 ferentia ; c, orifice of the Weberian body. 



Cctacca. Some time ago* I describe. 1 the 

 Weberian organ in the narwhal and dolphin. 

 It lies in fftc prostate, beneath the conspicuous 



* Zur Anatomic, &c., S. 100. 



