REPRODUCTIVE ORGANS. 719 
called the uterus masculinus. In many Mammals, paired 
diverticula, known as seminal vesicles, are connected with 
the ends of the vasa deferentia, but they are not developed 
in the rabbit. 
The uterus masculinus is the homologue of the vagina in 
the female, and seems to arise from the Miillerian ducts. 
It opens into the urethra, which runs backwards from the 
bladder, and the urogenital canal thus formed is continued 
through the penis. ‘ 
Beside the uterus masculinus and the vasa deferentia, 
there are lobed prostate glands opening by several ducts 
into the urogenital canal. Behind the prostate, on the 
dorsal wall of the urogenital canal, lie two Cowper’s 
glands. 
The penis projects in front of the anus behind the pubic 
symphysis, has vascular dorsal walls (corpus spongiosum), 
stiff ventral walls (corpora cavernosa), and. is invested by a 
loose sheath of skin—the prepuce. At the side of the penis 
lie two perineal glands. 
(3) Female.—The ovaries are small oval bodies about 
three-quarters of an inch in length, attached behind the 
kidneys to the dorsal abdominal wall, exhibiting on their 
surface several clear projections or Graafian follicles, each of 
which encloses an ovum. 
The ova, when mature, burst from the ovaries, and are 
caught by the adjacent anterior openings of the oviducts. 
The oviducts are modified Miillerian ducts, differentiated 
into three regions. The anterior portion or Fallopian tube 
is narrow, slightly convoluted, with a funnel-shaped, fimbri- 
ated mouth lying close to the ovary. The median portion 
or uterus is the region in which the fertilised ova become 
attached and develop. In the rabbit the uterine regions of 
the two oviducts are distinct, forming what is called a double 
uterus. In most Mammals the uterine regions of the ovi- 
ducts coalesce, forming a bicornuate or a single uterus, 
according to the completeness of the fusion. In all Mam- 
‘mals above Marsupials the posterior parts of the two 
oviducts unite in a median tube—the vagina. 
The vagina unites with the neck of the bladder, and forms 
the wide but short urogenital canal or vestibule, which. 
opens at the vulva, ventral to the anus. On the ventral wall 
