330 



OSWALD S. LOWSLEY 



which also separates it from the middle lobe and ejaculatory ducts 

 (fig. 8). An increase in the amount of connective tissue at this 

 point would be of great interest surgically in cases of perineal 

 prostatectomy, because the incision must be made entirely through 

 it, otherwise the enucleation procedure would lead the instrument 

 to the capsule instead of to the inside of that structure and hence 

 could not be completed. 



The posterior lobe is made up of eleven glands, some of which 

 have extended toward the bladder until they are almost as far 



Ventral 



Urelhra 



Lateral Lobe 



Lateral Lobe 



Middle 

 Lobe 



jc3?-.*- 



Posterior Lobe 

 Fig. 8 36 cm. (new-born) baby prostate X 6, camera lucida. 



back as the ends of the middle lobe tubules. Their course follows 

 rather closely the dorsal aspect of the ejaculatory ducts until the 

 latter structures ascend almost vertically towards the urethra, 

 immediately caudalward to which there is a small area free from 

 glandular elements. The ducts of posterior lobe tubules enter the 

 floor of the urethra caudal wards from the entrance of the ejacu- 

 latory ducts. The posterior lobe is the part of the prostate that 

 is palpated per rectum and presents in the middle of its posterior 



