. The American journal of anatomy. rnal mass of mucigen disappearsaltogether and in the whole of thegland proper only a slightly blue stainedband is discernible along the free borders 1. ,1 11 A j-i • 4. 1 f Fig. 7. Lower end of foveola g-as- 01 the cells. As the internal mass Ot trica and adjacent portion of cardiac T • • 1 • • ,1 • n g-land of tiie younji: pig-. X 1000. mucigen diminishes in size there is, how- rromaprepamtion stained in strong T . • XI mucliaeniatein and rubin. Portions ever, a corresponding increase m the stained hlue in muchaematein are „ 1 /> 1 • 1 -1 1 T_- 1 indicate
. The American journal of anatomy. rnal mass of mucigen disappearsaltogether and in the whole of thegland proper only a slightly blue stainedband is discernible along the free borders 1. ,1 11 A j-i • 4. 1 f Fig. 7. Lower end of foveola g-as- 01 the cells. As the internal mass Ot trica and adjacent portion of cardiac T • • 1 • • ,1 • n g-land of tiie younji: pig-. X 1000. mucigen diminishes in size there is, how- rromaprepamtion stained in strong T . • XI mucliaeniatein and rubin. Portions ever, a corresponding increase m the stained hlue in muchaematein are „ 1 /> 1 • 1 -1 1 T_- 1 indicated black in figure. number oi rubmophilous granules which occupy, in the upper portions of the glands one-third or more of the cell near the lumen. These granules are not zymogen granules, because they are not vis-ible in the fresh cell and because Greenwood, —. has shown that thecardiac mucous membrane of the pig yields, when tested by Griitznersmethod only one-eightieth as much pepsin as the fundus region. The. 12G The Cardiac (ilaiuls of Mammals gradual disappoaiajuc of ilio granules the internal mass of mucigciiincreases in size points to the probability that the latter is to some ex-tent formed at the expense of the substance of which the granules arecomposed. Similar granules have been observed after fixation in subli-mate solutions, by Carlicr, 99, in the epithelial cells of the stomach ofTriton, and I have myself observed them in many of the mucous cellsof the stomachs of different vertebrates, more particularly in theactively dividing cells at the bottom of the foveolae. As to their nature,the researches of Krause, 95, on the retrolingual gland of Erinaceusseem to be conclusive. He found that at a certain stage of secretionthe cells contained no mucin but, in sublimate specimens, were studdedwith minute rubinophilous granules. These granules were not visiblein the fresh salivary gland and their presence was explained by theassumption that the cel
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectanatomy, bookyear1901
