4 44 DISCOVERY REPORTS 



5. The prostata has the form of a series of glandulae urethrales opening diffusely 

 upon the dorsum of a part (pars pelvica) of the urino-genital canal surrounded by a 

 compressor prostatae muscle. 



6. There are no Cowper's glands and no vesiculae seminales. 



7. The testes are abdominal in position and are suspended in the body cavity by a 

 broad ligament, similar to that suspending the ovaries in the female. A plica diaphrag- 

 matica extends lateral to the kidneys on each side of the body. 



8. The urinary duct opens upon the verumontanum by a small pore which is closed 

 by a crista urethrae. 



9. No uterus masculinus was found, although other authors have described it in the 

 Fin whale as a small pit upon the verumontanum near the seminal pores. In the 

 Cetacea in general the Mullerian system is represented in a variety of ways, from a small 

 sac-like depression (Kogia breviceps) to a two-horned structure (Mesoplodon) resembling 

 a uterus bicornis. 



The vascular supply was described. This is largely obscured by the development of 

 a large inguinal plexus. 



Some account of the female genital system of the Fin whale was given from the dis- 

 section of two foetuses, 2-1 and 173 m. in length. 



The main points in the anatomy of the female genital system are : 



1. The external genitalia are contained in a genital slit on the ventral abdominal 

 surface which has been called the vulva. It is bounded by two swollen lips which have 

 been called the labia majora. The vulva is surrounded by a sphincter-like musculo- 

 fibrous mass composed of the interpelvic ligament, the levator ani and the panniculus. 



2. The urinary and genital apertures are separate, but the clitoris is not perforated. 



3. A finger-like clitoris, between two labia minora, overhangs the urinary opening. 

 It may be compared with the male penis turned backwards through 180 , so that its 

 anterior face looks backwards and its tip upwards. The clitoris contains rudimentary 

 cavernous bodies. 



4. The mammary glands are tubulo-racemose glands embraced by a compressor 

 mammae muscle. The nipples are inguinal in position and are "pseudo-nipples". 



5. The ovary lies free on the ligamentum latum and is not enclosed in any sort of 

 sac or pavilion. 



6. The oviducal funnel has a fimbriated edge. 



7. The uterus is a uterus bicornis and the corpus uteri is short. There is no well- 

 marked os uteri. 



8. The vagina is long and is provided with circular funnel-like transverse folds in its 

 upper part. At its opening into the vulva it is provided with a sphincter vaginae 

 muscle. 



9. The opening of the vagina is frequently obstructed in the virgin by a fibrous 

 "vaginal band", which becomes ruptured at coition and persists as a tag-like remnant. 



Mention has been made of the nervous supply to the urino-genital region. A main 

 lumbo-genital nerve comes off from the 10th, nth and 12th lumbar spinal nerves. 



