The _vascular polypus_, attached usually by a narrow base, is of a florid color, of a soft consistence, and not very large in size. On section we find numerous vessels interspersed throughout a fibro-cellular tissue. Carcinomatous disease is more liable to supervene in the case of the fibrous growths, than in the other of these formations. 10. =Myomatous Tumors.= The _Myomata_ are tumors consisting of muscular tissue, either of the striated, or nonstriated variety. The former are exceedingly rare and generally congenital, the latter are quite frequent and are never congenital; but occur principally in elderly subjects. They are met with most frequently in the uterus, where they sometimes attain an immense size. They form either distinctly circumscribed tumors of a globular, conical, or pyriform shape, or ill-defined masses in the uterine walls. When projecting into the cavity of the uterus, or into the abdominal cavity, they assume the shape of polypi, with a narrow pedicle. Myomata may also occur in the prostate gland, in the œsophagus, stomach and intestines. “In structure they consist of elongated spindle-shaped cells, more or less isolated, or grouped into fasciculi of various sizes, with a varying amount of connective tissue.” Maceration with dilute nitric acid, is often necessary in order to isolate and display the muscular elements. 11. =Vascular Tumors.= The _Angiomata_ are tumors consisting of blood-vessels, held together by a small amount of connective tissue. They include the various forms of nævi, the erectile tumors, and aneurism by anastomosis. They are generally met with as congenital affections. Their ordinary sites are the skin and mucous membranes, especially about the head, face and tongue. They are soft and spongy, easily compressible, and very elastic, varying in color according to the nature of their contents, whether venous or arterial, or both combined. 12. =Neuromatous Tumors.= True _Neuromata_ are tumors consisting almost entirely of nerve tissue. The term has also been applied to growths of other kinds, found in connection with nerves; these are false or spurious neuromata. True neuromata are of very rare occurrence. They consist mainly of a new growth of nerve fibres. “They resemble in structure the cerebro-spinal nerves, consisting of tubular fibres, with a varying quantity of intertubular connective tissue, and in some cases a few gray, gelatinous fibres.” They usually exist as small, single nodules, solid to the touch, firm, inelastic, and developed within the neurilemma of the affected nerve. The most frequent seat of these growths is the extremities of divided nerves, where they sometimes occur after amputation. They may also exist in the course of the nerves, in any situation, singly, or in great numbers.