The development of the hypothalamo-hypophysial portal system in human fetus.

In the earliest stages of development of the nervous system, the hypophysial stalk has a horizontal disposition (having, above the hypothalamus and below the anterior lobe of the hypophysis, a group of cells placed in the sella turcica). The stalk becomes vertical in the VI--VII month of fetal life. Until the stage corresponding to the length of 92 mm vertex--coccis of the fetus, few blood vessels are to be found in this region; they follow the stalk's direction.

The suspensory muscle of the duodenum.

The suspensory muscle of the duodenum continues the muscular layers of the duodenum, which is consequently surrounded on its mesenteric border only by the muscularis mucosae. Between the muscle bundles of the suspensor there is much loose connective and adipose tissue. Microganglions of no more than 90 cells may be found between the muscle bundles of the suspensor.

The mesencephalic nucleus of the trigeminus in man.

If the mesencephalic trigeminal nucleus were built up uniquely from unipolar, big cells, its extension in man would be greater than hitherto admitted: on both sides of the mesencephalic tract, mingled with cells of the locus ceruleus, and in the superior medullary velum. In all sites, beside unipolar cells there are always a few bi- and multipolar cells in the constitution of the mesencephalic trigeminal nucleus. The big cells of this nucleus are not perfectly spherical, as often suggested, but always somewhat flattened.