. Contributions to embryology. Embryology. Text-Fiotre 1.^-Outline tracings of the cells in the two olives: cells .'V-E inclusive are from the human inferior olive; cells F-I are typical cells from the superior olive of an adult dog; cells J-M are from the medial ma,ss of the superior olive of an adult cat; oeUs N-P are from the lateral mass of the same; cells Q-U are typical cells from the superior olive of a human fetas. The outlines were made with camera lucida, A-P being made with a 4 mm. objective and No. X ocular, Q-U being made with a 1/12 objective and No. X ocular. The cell type which
. Contributions to embryology. Embryology. Text-Fiotre 1.^-Outline tracings of the cells in the two olives: cells .'V-E inclusive are from the human inferior olive; cells F-I are typical cells from the superior olive of an adult dog; cells J-M are from the medial ma,ss of the superior olive of an adult cat; oeUs N-P are from the lateral mass of the same; cells Q-U are typical cells from the superior olive of a human fetas. The outlines were made with camera lucida, A-P being made with a 4 mm. objective and No. X ocular, Q-U being made with a 1/12 objective and No. X ocular. The cell type which is characteristic of the superior olive is more or less definitely sjiindle-shaped, a great number being true spindles with a narrow, long- drawn-out cell body, the nucleus being compressed laterally (ovoid) to conform to the shape of the cell body, and the processes coming off from the two extremities of the spindle. Another type of cell, especially abundant in the ohve of the adult cat, presents a large cell body with a large vesicular nucleus, the cell body tapering sharply at its two poles. Unless studied carefully through a series of sections, these cells may be thought to be club-shaped. Indeed, Kolliker classes them as such. A careful serial study, however, shows them to present two sharp poles with a rather fat intervening body, a modified spindle. A third type of cell found in but not limited to the superior olivary nucleus in all animals is a small, Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Carnegie Institution of Washington. Washington, D. C
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