PLACENTATION OF THE SEALS. 297 
glands could be distinctly seen closely crowded together, as: is so well repre- 
sented in Dr SuArpey’s figure (fig. 209), and in BiscHorr’s memoir (Entwichklungs- 
geschichte des Hunde Eies, plate xiv. fig. 47). When horizontal sections 
were made through the membrane near its surface, the glands were seen to be 
transversely divided, and so closely set together that the interval between any 
_ two adjacent glands was in some cases not equal to, in other cases about equal 
to, the transverse diameter of a gland tube; further, all the gland tubes in any 
given transverse section exhibited the same structural characters. When ver- 
tical sections through the membrane were examined, long compound tubular 
glands were readily seen passing into the deeper part of the mucosa, and between 
these, short and simple tubes were also recognised, so that under low magnify- 
ing powers, these sections at first sight seemed to confirm the observations of 
SHARPEY, BiscHorr, and WEBER, which were made under magnifying powers of 
10 and 12 diameters. When magnified more highly, these apparently short 
simple glands were seen to vary considerably in length, some dipping for only a 
short distance from the surface of the mucosa, others for a greater distance, and 
exhibiting, indeed, every gradation in length up to the branched tubular glands 
themselves. But in the connective tissue immediately deeper than the short 
glands, portions of tubes were seen extending in line with the short tubes, though 
apparently not continuous with them; but often with careful focussing a con- 
tinuity could be traced, though obscured by overlying connective tissue (fig. 
17). Iam therefore of opinion that the utricular glands in the bitch, as in so 
many other animals, lie in the mucosa, some almost vertically, others in various 
degrees of obliquity, so that, when vertical sections are made, some are cut 
short across, others longer, whilst others again may be seen in almost their 
entire length. I conclude that all the glands belong to the type of compound 
tubular glands; that the apparent differences in length are simply due to the 
mode in which they are cut across in making the section, and that the physio- 
logical division proposed by BiscHorr into simple mucous crypts and proper 
tubular glands cannot be sustained. — 
From a dissection which I have made of the gravid uterus of a Fox at about 
the mid period of gestation, I have satisfied myself that it corresponds in many 
respects with the bitch, though with specific differences. The uterine mucosa 
remained on the uterus when the placenta was stripped off, and possessed pits 
or trenches with intermediate ragged folds. The uterine face of the placenta 
was flocculent, owing to the prolongations of the folds into the substance 
of the placenta being torn across in the process of separation. These pro- 
_ longations entered the placenta at a number of points, and passed with a 
| sinuous course up to the chorion, and gave off many branches, which not un- 
| frequently were arranged as an anastomosing reticulum, in the meshes of which 
the lateral offshoots of the villi were lodged. They were very vascular, andl. 
