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Show 684 MESSRS. GARROD AND TURNER ON [June 18, membrane consisted of a gland layer and a crypt layer. The gland layer was next the muscular coat, and consisted of elongated tubular glands, somewhat tortuous and occasionally bifurcating. In the vertical sections the glands were cut across so that the tubes were sometimes transversely, at others obliquely, at others longitudinally divided, and here and there the stem of a gland could be seen passing obliquely through the crypt-layer to open on the surface in the manner already described. The glands were lined by a columnar epithelium, and possessed a central lumen. The glands were neither so numerous nor so distinct, neither did they bifurcate so frequently as do the utricular glands in the Pig and the Cetacea. The crvpt layer contained the numerous depressions already referred to for the lodgment of the villi of the chorion. The epithelium lining the crypts had, as a rule, disappeared ; so that it was only in exceptional localities that it could be seen in situ, where it appeared to consist of cells, the type form of which was columnar, though modifications of that shape occurred. The subepithelial connective tissue contained a large proportion of corpuscles, some of which were fusiform, others polygonal, others of the rounded form of white blood-corpuscles. This tissue was more compact where it formed the. walls of the crypts; but deeper in the mucosa, as it approached the glandular layer and the muscular coat, it had an areo-lated character. The vessels of the uterus were not injected; but there can be no doubt that, if they had been so, the walls of the crypts would have been seen to contain an abundant freely anastomosing network of capillaries, such as exist in the corresponding crypts in the Cetacea, the Mare, the Pig, and the Lemurs. In sections through the wall of the uterus, that had been stained with heematoxylin, a well-defined band, coloured with the blue pigment, marked the junction of the deep surface of the mucous membrane and its glands with the muscular coat. This band in all probability was the muscularis mucosae. In Hyomoschus, as in other animals possessing a diffused placenta, the uterine glands have no relation, as regards numbers or termination, to the crypts. The crypts are infinitely more numerous than the glands, and are not to be regarded as formed by a dilatation of their mouths, but are new formations during pregnancy, due to hypertrophy and folding of the mucous membrane so as closely to adapt it to the irregular villous surface of the foetal chorion. The chorion extended from the tip of the left uterine cornu, through the corpus uteri, to the tip of the right uterine cornu. The left horn of the chorion, which contained the foetus, was longer and much more capacious than the right horn. The tip of each horn of the chorion was in close relation to the orifice of each Fallopian tube ; and close to the tip the free surface of the chorion was over a very limited area smooth and non-villous. That part of the chorion situated in the corpus uteri, immediately opposite the os uteri, presented a circular non-villous surface about the size of a shilling. This surface, though without villi, was folded so as to adapt it to the corresponding folds of the uterine mucosa in the same locality. A portion of |