OCR Text |
Show 284 MR. W. S. KENT ON NEW MADREPORES. [Apr. 4, (Bulletin Mus. Comp. Zoology, Cambridge, U. S. p. 53, 1863), which has been already adopted by Milne-Edwards for a genus of the Cyathophylliidae. He separates it from Echinopora on account of the echinate and coarsely costate character of the lower surface of the corallum. T. lacera and aspera, Verrill, are the species referable to this genus. Family FUNGID_E. L E P T O S E R I S STRIATUS, n. sp. Corallum suborbicular, explanate and undulate, slightly revolute. Calices remotely scattered; the excentral ones slightly elevated. Columella rudimentary. Septa evenly developed, not prominent, rather thickened; their external edge subentire, their lateral surfaces granulate, for the most part continuous from the centre of the calice to the margin of the corallum, to the whole surface of which they give a waved and striate aspect. Inferior surface evenly and finely costulate. Diameter of the corallum 2 inches, of the central calice g inch. Hab. Borneo. Collected by Sir E. Belcher. B.M. This form differs from the species hitherto described in the explanate and slightly convex instead of infundibulate contour of its corallum, as also in its evenly developed septa and in its exceedingly sparsely scattered calicinal centres. Section PERFORATA. Family MADREPORID_E. BALANOPHYLLIA IMPERIALIS, n. sp. (Plate XXIII. figs. 5, 5 a, bi) Corallum curved, slightly compressed, attached by a slender base. Calicinal fossa elliptical, very deep. Columella well developed, trabecular. Septa forming five complete cycles, much exsert, more particularly those of the first three orders, which are of almost equal size, and have their inner edge entire and their lateral surfaces granulate ; those forming the first and second orders entirely equal, and having their internal edge thickened in the vicinity of the columella, as in Endopachys. The internal edge of the septa of the fourth and fifth cycles lacinulate, more especially those of the fifth. Septa of the sixth and eighth, and seventh and ninth orders coalescing with those of the fourth and fifth, and continuous to the columella in the form of a single septum. Costae stout, conspicuous from the base to the margin of the calice, their surface echinate ; united laterally by coarse trabeculae. No epitheca. Height of corallum nearly 2 inches ; longer diameter 1-g^ inch, of the shorter one | inch. Hab. Singapore. B.M. This species surpasses in size and in the beauty and symmetry of its internal structure any representative of the genus yet recorded *. * Through an accident one of the septal systems in the specimen figured has become slightly distorted. |