. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. Biliary Organs of Musca carnaria. a, portion of a trunk and two branches of one of the biliary tubes of the flesh-fly, viewed by re- flected light, and magnified eight diameters; b, portion of a biliary tube of the flesh-fly highly magnified, exhibiting the arrangement of the se- creting cells, and the mode of distribution of the trachea?; c, a secreting cell from the liver of the flesh-fly, very highly magnified. (After Leidy.) towards the free extremities the sides of the tubes are so irregular, that they appear as if
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. Biliary Organs of Musca carnaria. a, portion of a trunk and two branches of one of the biliary tubes of the flesh-fly, viewed by re- flected light, and magnified eight diameters; b, portion of a biliary tube of the flesh-fly highly magnified, exhibiting the arrangement of the se- creting cells, and the mode of distribution of the trachea?; c, a secreting cell from the liver of the flesh-fly, very highly magnified. (After Leidy.) towards the free extremities the sides of the tubes are so irregular, that they appear as if merely folded upon the secreting cells to keep them together. The secreting cells are round, oval, or nearly cylindrical from elongation. Their average measurement is about '09 millim. The contents are white, yellowish, or brownish, and consist of a finely granular matter, numerous fine oil globules, a granular nucleus, and a transparent nucleolus. The cells in the extremity of the tubes are not more than half the size of those a little further on (or nearer the termination), and contain less granular matter and no oil globules, so that they are more distinct, and the nucleus more apparent. Upon advancing a very little, the cells are found to be of an increased size, and full of granular matter, so as considerably to obscure the nucleus from view. A little further, we find the addition of fine oil globules, readily distinguishable by their thick, black outline when viewed in a certain focus. Sometimes the cells become so filled with oil, as to be distended with it, rendering the granular matter and nucleus so transparent as totally to destroy all appearance of the for- mer, and the latter only is to be perceived in faint outline. Such a state I have frequently observed in Dcrmestcs, Ateuc/nis, &c. The nucleus (fg. 31 I. c) is generally central, glo- bular, and pretty uniform in size in the same species, averaging in measurement about -025 millim. The nucleolus is always tr
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