155 CLINICAL SOCIETY OF LONDON. colnmnar cells when malignant developed a lesion indis-.tinguishable from that of squamous. "Duct cancers " of the mamma were intra-cystic carcinomatous vegetations; the cysts were much more often dilated acini than dilated ducts ; the cells from which they sprung were those of the gland parenchyma, therefore identical with the parent cells of scirrhus j and any clinical differences, such as tardi-,ness in infecting the glands, were due to the cyst wall, which

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... stituted a rigid envelope or "capsule."-Mr. JACKSON CLARKE said that there was good clinical