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 

 Cyathophylliidse. 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 Fungi djs. 

 Leptoseris 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 sur- 

 faces 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 ex- 

 planate 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, b.) 



Corallum curved, slightly compressed, attached by a slender base. 

 Calicinal fossa elliptical, very deep. Columella well developed, trabe- 

 cular. Septa forming five complete cycles, much exsert, more parti- 

 cularly 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 coales- 

 cing with those of the fourth and fifth, and continuous to the columella 

 in the form of a single septum. Costse stout, conspicuous from the 

 base to the margin of the calice, their surface echinate ; united late- 

 rally by coarse trabecular. No epitheca. Height of corallum nearly 

 2 inches ; longer diameter 1 ^ inch, of the shorter one f 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. 



