1) The India ink particles, introduced into the peritoneal cavity, entered the lymphatic capillaries in the tendon parts of the diaphragm through the submesothelial tissue spaces between the collagenous bundles. Frequently, thin cytoplasmic processes of the lymphatic endothelial cells extended on the surface of the submesothelial collagenous bundles to come in direct contact with the peritoneal cells.
2) The India ink particles were carried from the peritoneal cavity through a dilated, canal-like intercellular space between two neighbouring peritoneal cells, or through a opening between two widely separated peritoneal cells into the submesothelial tissue space. The India ink particles were also transferred through the cytoplasm of the peritoneal cells. In the cytoplasm, the carbon granules was situated in the vacuoles, varying in size and shape, and in the opaque bodies. The vacuoles including the carbon granules were greatly increased in number at 60 minutes after injection, although the intercellular spaces were the main pathway at 15 to 30 minutes after injection.
3) From the submesothelial tissue space the carbon particles were transported through the intercellular spaces between the lymphatic endothelial cells, or through the vacuoles in the cytoplasm of the lymphatic endothelial cells into the lumen of the lymphatic capillaries.

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An anomalous peritoneal sac enclosing almost completely the windings of the small intestine was encountered in a human cadaver dissected in the gross-anatomy laboratory. Judging from the general features, it seems apparent that this peritoneal sac is not formed by pathological changes of the peritoneum such as inflammatory adhesions. Different from the cases reported hitherto, the present specimen shows a peculiarity that the ascending colon is involved in the anterior wall of the sac.
Topographical relations o f the sac to the mesentery proper as well as the mode of arterial supply to the ascending colon suggests that the left half or lobe of the sac is derived from the original ascending mesocolon, while the right half may be formed by the omentum-like extension of the same mesocolon.

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A cytological study was made of the anterior hypophysis of mice placed in a hot box at temperatures of 34° to 38°C for a period of 1 to 65 days.
1. Mark e d cytological changes in acidophils were not found throughout the whole period of this work.
2. Two types of basophils showed apparently significant cytological changes. The number of beta-cells showed a normal value on the 1st to 4th days of this work, a moderate decrease on the 5th to 16th days and increase on the 20th to 60th days. At the end of this work, the beta-cells appeared to approach the normal level. Degranulation and vacuolization of the cytoplasm occurred throughout the whole period, especially on the 7th to 9th days, whereas regranulation of beta-cells was observed in the latter half of this work.
The delta-cells increased in number on the 1st to 35th days. After about the 40th day, the number of delta-cells seemd to remain at the normal level. Degranulation and vacuolization of the cytoplasm were obsevered during the first half of this work.
3. Chromophobes showed no change in number and cytological detail throughout the whole period of this work.

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Eleven male mice of 90 days of age were injected daily with 10 mg of vitamin E (“Juvela” prepared by Eisai Co., Ltd. ). After 40 days, they were sacrificed and their testes were histologically examined.
1) In the seminiferous tubules, the germinal cells except spermatids and sperms did not indicate a marked histological change in number and cytological appearence, and marked stimulation of division in the germinal cells was not observed, but mature spermatids and sperms increased generally by administration of vitamin E.
2 ) Concerning the interstitial cells, it was observed that hypertrophy and an appearence of vacuoles in the cytoplasm were somewhat more frequently found than in the control.
3) These data suggest that vitamin E administration activates spermiogenesis and function of interstitial cells in mature mice.
The authors wish to express their gratitude for constant guidance and helpful suggestions to Prof. Dr. K. Yamada and for help of Assist. Prof. Dr. M. S a n o. The authors are also indebted to Mr. F. Sanda in preparing the microphotographs in this article.

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I found a well developed parumbilical vein in the lig. falciforme hepatis of the cadaver with hepatic cirrhosis. The results of the morphological observation on that vessel are reported.

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The author showed the atrioventricular pathway in the heart of the scaly ant-eater by reconstructionmodel, and the author did not take up the problem of the sinoatrial node and the connection between the sinoatrial and the atrioventricular node.

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A cell-counting method is described for estimation of the number of nucleated cells in the thymolymphatic tissues and bone marrow. The principle of the method consists of preparing the cell suspension of each tissue and of making hemocytometer count of nucleated cells. Data obtained from 15 young adult albino rats weighing around 200 g are summarized in Table 1.

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