Specific Chars.—Polyzoarium composed of small cylindrical stems occupied by oval to hexagonal cells arranged usually in quincunx; or in oblique ascending lines; periphery of the cells erect, sharp, and granular; granules minute, numerous, and closely arranged. Here and there the angles between the cells are occupied by a small supplementary pore or pores, which are occasionally increased in number, and extend vertically between two contiguous cells, or uniting, give rise to an elongated narrow groove-like slit. Section circular.