536 
MR. OWEN ON THE MAMMARY GLANDS 
bablv prepared for impregnation. The letters indicate the same 
parts as in the preceding plate: f is the ovary, slightly developed 
on the right side. 
Fig. 2. One of the mammary glands, from the same individual, beginning to 
enlarge. 
Plate XVII. 
Fig. 1. The same parts as are represented in fig. 1. of the preceding plate, 
but further dissected and laid open. 
a. The common outlet or orifice of the vestibule. 
b. The vestibule, with its anterior or sternal parietes removed. 
b'. A probe passed through the rectum into the vestibule. 
c. The urethro-sexual canal laid open. 
d . The orifice by which the urethro-sexual canal communicates with 
the vestibule. 
d , d. The dilated or uterine portions of the oviducts laid open. 
d', d!. The contracted or Fallopian portions: that on the left side is laid 
open through its whole extent, showing the dilated cavity at d" . 
e , e. The wide slits which form the orifices of the oviducts. 
f,f. The ovaries, i, i. The ligaments which attach the oviducts and 
ovaries to the back of the abdomen. 
k. The urinary bladder opening into the atlantal extremity of the ure¬ 
thro-sexual canal. 
/, l. The ureters, through which bristles are passed to show their termi¬ 
nations in the urethro-sexual canal. 
m. The orifices of the uterine tubes ; that on the left side is laid open. 
They were each situated in this instance on a prominence resem¬ 
bling an os tincae. 
This figure is in some measure a repetition of the preceding; but is 
here added, as it supplies some of the deficiencies in the figures 
previously given of these remarkable organs. The figure in the 
ninety-second volume of the Philosophical Transactions, PI. IV. 
represents both the uterine tubes of the same size; and neither 
the Fallopian orifices, the ovaries, nor the terminations of the 
ureters are shown. In the more recent figure by Professor 
