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Show 1871.] MR. W. S. KENT ON NEW MADREPORES. 275 the quills are more marked with black. The first four quills are edged outwardly and tipped with black, their inner webs being for the most part of that colour ; the fifth to seventh less so by degrees, with the white tip, not visible on the first and second, gradually increasing in size. Bill black. Feet dark brownish red. This species is very common during winter at Amoy, ascending the river in large parties at fall of tide, and pouncing on small fish and crustaceans left exposed by the receding water. April 4, 1871. Robert Hudson, Esq., F.R.S., V.P., in the Chair. The following papers were read : - 1. On some new and little-known Species of Madrepores, or Stony Corals, in the-British M u s e u m Collection. By W . S A V I L L E K E N T , F.Z.S., F.R.M.S., of the Geological Department. British M u s e u m. [Eeceived March 18, 1871.] (Plates XXIII.-XXV.) Last year while engaged in arranging, naming, and preparing a Catalogue of the Stony Corals contained in the National Collection, numerous new and little-known forms fell beneath m y notice, some of which, with Dr. Gray's kind permission, I shall now proceed to describe. Section A P O R O S A. Family T U R B I N O L I D _ E. A C A N T H O C Y A T H U S SPINIGER, n. sp. (Plate XXIII. figs. 1, 1 a, b, ci) Corallum turbinate, straight, slightly compressed ; attached when young. Calice oval, the lateral extremities somewhat angular, its fossa deep. Primary and secondary costse very prominent, the former conspicuous from the base, and each bearing spinous prolongations, those situated on the two lateral costa. the most developed. Septa 48 in number, forming four complete cycles, much exsert, more especially the primaries; their lateral surfaces granulate, their internal edge slightly flexuous, Columella elongate, formed of two or three twisted lamella.. Pali slender, twelve in number, situated opposite the septa of the third septal cycle. External surface of the the theca finely granulate. Hab. Japan. B.M. |