3° 



38. Fl abel In ui distinctum Edw. & H. 



Flabellum distinctum Milne Edwards et Haime, Ann. Sci. Nat., 3 ser., Zool., IX, 1848,13.262, 

 and Hist. Nat. Corall. II, 80. Duncan, Trans. Zool. Soa, London, VIII, 1S74, p. 322, 

 pi. XXXIX. figs. 1 — 13. Wyville Thomson, Depths of the Sea, pp. 431, 432. Jourdan, 

 Hirondelle Zoanthaires (Monaco) 1895, p. 26, pi. II. figs. 12, 13. 



Flabellum patens Moseley, Challenger Deep Sea Madreporaria, p. 172, pi. VI. figs. 4a, $a. 



Stat. 12. 7 15 S., ii5°is'.6E. 289 m. 2 Ex. 



[Stat. 51. Madura Bay & Molo-Strait. 69 — 91 m. 4 Ex.] 

 [Stat. 166. 2°28'.5S., 131 3'.3 E. 118 m. 1 Ex.] 



The two dead coralla from Station 1 2 are almost certainly this species, but I am not 

 quite so confident about the other specimens. 



Distribution. E. Atlantic (Azores and coast of Portugal), East Indian Archipelago and 

 Japan : fossil in the Miocene of Southern Europe. 



39. Flabellum lamellulosum n. sp. Plate IV. Fig. 28, 28^ — b. 



Stat. 251. 5°28'.4S., i32°o'.2E. 204 m. 1 Ex. 



Corallum snow-white, of excessively thin and translucent texture, shaped like a widely- 

 stretched fan, its circumference being equal to about 285 degrees of a circle. There is a slender 

 short pedicle, and the lateral costae, which arch outwards and downwards, are sharp and finely 

 and irregularly jagged. The two faces of the corallum are slightly concave and moderately 

 everted, are traversed by faint radiating costse, and are ver)- faintly marked with fine wavy 

 transverse accretion-lines. 



The septa, which are very thin, are in the unique specimen 336 in number. Forty-eight 

 large ones of equal size divide the calicle into 48 compartments each of which contains 7 

 smaller septa of diminishing size. Of these 7 septa the largest one (fifth cycle) does not descend 

 quite to the level of the columella, the two next largest (sixth cycle) do not descend quite 

 half-way down the calicular wall, and the four smallest (incomplete seventh cycle) are very 

 short. The surfaces of the septa are finely, sharply, and somewhat sparsely granular, and their 

 edges as they descend in the calicle become sinuous, especially in the case of the larger septa. 



The columella, which is deep-seated and narrow, is formed by small trabecula; from the 

 48 large septa of the first four cycles. 



Greatest height of corallum 39 millim. 



Maximum diameter of corallum 47 „ 



This species is, evidently, nearly related to F. pavoninum, but the corallum forms an 

 arch of more than three quarters of a circle and the septa are nearly twice as numerous. 



40. Flabellum australe Moseley. 



Flabellum australe Moseley, Challenger Deep Sea Madreporaria, p. 173, pi. VII. figs. ^a. $a, b. 

 Stat. 251. 5°28'.4S., i32°o'.2E. 204 m. 1 Ex. 



