On Trochocyathus anglicus, a new species of Madreporaria from the Red Crag

I. The coral about to be described was found in the Red Crag within the grounds of Great Bealings Rectory, Suffolk*. There is only one specimen; but it is so well preserved, and its anatomical details are so perfect, that there is no difficulty in giving the form a generic and specific appelation. TROCHOCYATHUS ANGLICUS. Pl. XXVIII. figs. 1-4. The coral is subhemispherical in shape, and has a small flattened base, upon which there are the marks resulting from the disruption of a former adhesion (fig. 4). The outside of the coral, from the cicatrix at the base to the calicular margin, is covered with a smooth, opaque, and plain epitheca. The epitheca hides the costæ, and is faintly ornamented superiorly with an indistinct "vandyke" pattern. The calice (figs. 1,2) is nearly circular in its outline, is slightly inverted at the margin (which is broad), and is shallow. The columella is formed by the junction of the pali and by a small amount of proper tissue; it is small but prominent, and rises to a higher level than the septa at their junction with the pali. The septa are long, unequal, separate, and non-exsert; there are six systems of them; and there are the members of four cycles in each system. The primary septa are slightly larger than the secondary; and both dip down from the inverted margin of the calice into the fossa and come into contact with pali. The septa of the third cycle are smaller than those