REPORT ON CORALS— DEEP-SEA MADREPORARIA. 169 



in the specimens obtained living. The edge of the calicle is notched, the resulting serra- 

 tions corresponding with the primary, secondary, tertiary, and quaternary septa. The 

 serrations corresponding with the cpiaternary septa are as high as, or higher than, those 

 of the tertiary septa. The septa are nearly straight, but slightly undulate all over ; 

 their surfaces are sparsely covered with minute-pointed granules. The columella is 

 made up of abundant, very stout, and unusually contorted fascicular outgrowths from 

 the septa. The soft tissues of the living animal are of a dark madder colour. There are 

 forty-eight tentacles disposed at the inner margins of the septa at successively greater 

 intervals from the mouth of the animal, as shown in the figure (PL XVI. fig. 12). The 

 tentacles are of four sizes corresponding with the septa. 



This species appears to come near Flabellum sinense, Milne-Edwards and Haime, of 

 which I have seen specimens in the Turin Museum, from Miocene deposits at Turin. 



Height of the largest specimen, 35 mm. Longer diameter of the calicle, 50 mm. 

 Shorter diameter, 40 mm. 



Station 232, off Enosima, Japan. 345 fathoms. About eight specimens. 



Flabellum alabastrum, Moseley (Proc. Eoy. Soc, 1876, p. 555). (PI. VII. figs. 1, 

 1«, lb, 2, 2a, 2b; PI. XVI. fig. 11.) 



Flabellum alabastrum (Moseley). Slightly enlarged. 



The corallum is of a beautiful light-pink colour, and is very thin and fragile. 

 It is wedge-shaped, the calicle arising from an attenuated pedicle. The lateral 

 costse make an angle with one another of from 120° to 140°, and are sharp and 

 moderately prominent, with an irregular edge. The external surface of the calicle 

 is covered with a glistening epitheca, which is whitish in colour towards the pedicle. 

 The primary and secondary costse on the faces are almost as well marked as the 



(ZOOL. CHALL. EXP. PAET VII. — 1880.) G 22 



