528 
MR. OWEN ON THE MAMMARY GLANDS 
high magnifying power, to detect a distinct arrangement of fibres in it. It 
is most easily demonstrated as a distinct coat in the dilated uterine portion of 
the tube. The innermost coat is a soft pulpy membrane with a slightly gra- 
nular surface in the uterine portion of the tube, but thin and smooth in the 
Fallopian division. The difference was most considerable in the specimen with 
the largest ovary, in the uterine portion of which this membrane was thick- 
ened and of a dark colour, but no villi were perceptible on it when examined 
with the lens. 
The left uterus, in the specimen with the large ovary, (Fig. 1 . PL XVI. & fig. 3. 
PI. XVII.) was for the first two inches of its extent from four to five lines in 
diameter, and about a line thick in its parietes ; it then became suddenly con- 
tracted, and thinner in its coats, diminishing in diameter to about two lines, 
and afterwards slightly enlarging to within an inch of the extremity which 
forms a wide membranous pouch opening into the capsule of the ovary by an 
oblong orifice or slit of eight lines in extent. The edges of this orifice were 
entire, as in the oviducts of reptiles ; not jagged as in the fimbriated extremity 
of the Fallopian tube in ordinary quadrupeds : nevertheless the dilated and 
muscular part of the tube at its commencement may be considered as the 
true uterus, and the contracted portion beyond as the Fallopian tube. The 
entire length of this uterus when detached from its connexions was nine 
inches. The right uterus in the same specimen exhibited similar differences in 
diameter and structure ; but the contracted part representing the Fallopian 
tube was shorter in proportion to the true uterine division. This uterus mea- 
sured six inches in length. 
In the specimen with the smallest developed ovary, (PL XV. fig. 1.) the first 
portion of the uterine tubes was very little wider than the second, and not 
thicker in its coats ; the entire tubes were much less in all their dimensions 
than those just described, and the terminal cavity, though more dilated than 
the rest of the tube, was also smaller. 
In another specimen, in which the ovary (PL XVIII. fig. 4.) appeared to have 
shed its contents, the uteri presented the same variations of diameter as in 
the specimen with the largely developed ovary ; but the parietes of the uterine 
portion were not so thick. 
In the specimen above described with the large ovary, the thickened parietes 
of the first portion of the uterine tube depended chiefly on an increase of the 
