PATHOLOGIC PART BY DR. FUNKE.
A knowledge of the normal gland would facilitate the study of the tumors arising from the carotid gland, but the lack of this information has led to the existing confusion with regard to the classification of the neoplasms. Then, too, the obscure embryology adds to the confusion.
In 1881 Stieda23 attempted to enlighten us on this question. He found a triangular cell collection connected by means of a fine fibrous strand with the mouth epithelium on the one hand and with the thymus gland on the other. In embryos of 36 mm. the cell collection was round and no longer connected with the structures just named. The cell collection, he holds, gives rise to the carotid gland. In sheep embryos of 10 and 11 mm. the gland is first seen as a thickening of the posterior portion of the horizontal branch of the