viii, FLABELLUM, Less., Edw. & H., Martin Duncan. 
14, Flabellum paripavoninwm, Alcock. Pl. ii. figs. 3, 8a-d. 
Flabellum paripavoninum, Alcock, Journ, As. Soc. Bengal, Vol. LXIII. pt. 2, 1894, p. 187. 
Corallum compressed, fan-shaped, with a sessile scar of attachment but no 
pedicle, and with the two faces somewhat concave, 
The lateral costee are sharp but not salient, they meet the basal sear at an 
angle of about 45 degrees: the other costs are merely sinuous striations. 
The margin of the calicle is almost entire, and forms a segment of a circle 
of about 230 degrees; so that when the corallum is held straight in front of 
the eyes, with the major axis end on, and without any inclination, the colu- 
mella—such as it is—is plainly visible above that plane of the calicular margin. 
The septa are in six cycles, the last cycle not quite complete; they are all 
extremely thin, and have the free edges sharp and straight (not sinuous) and 
the granular strize of the surface inconspicuous. Those of the first three cycles 
are almost equal and meet together at the bottom of the calicle to form a sort 
of columella by their slightly-thickened ends. Those of the fourth cycle are 
not so very much smaller than their predecessors, but do not meet them. 
Those of the last two cycles are small. 
Colour of corallum, pale madder, the septa gradually becoming almost 
white. 
Off Pedro Bank (Laccadive Sea) 636 fms. 
Height of corallum 39 millim.; major axis of calicular orifice, 37°5; minor 
axis, owing to the eversion of the rim of the calicle, 30°5 millim. 
Judging from Lesson’s figure (Illustr. de Zool. pl. xiv.) and Dana’s des- 
cription and figures (U. 8S. Expl. Exp., Zoophytes, p. 159, pl. vi. figs. 5, 6, 6a) 
this species is distinct from Mabellum pavoninum which has a pedicle, and 
sinuous septa, the first four cycles of which are equal. At any rate, it is quite 
as distinct from that species as Plabellum distinctum Edw. and H. is. 
15. Flabellum laciniatum (Phil.) Edw. & H. Pl. ii. figs, 4, 4a. 
Phyllodes laciniatwm, Philippi Neues Jahrb, f. Mineral. Geol. etc., Stuttgart, IX. 1841, p. 665, pl. xi. fig. B 2. 
Flabellum laciniatum, Edwards and Haime, Ann, Soi. Nat., Zool., ser. 3, IX. 1848, p. 273: Hist. Nat. Coruall. 
II. 92. 
Flabellum laciniatum, Seguenza, Mem. Accad. Sci. Torino, ser. 2, XXI. 1864, p. 485, pl. x. fig. 7. 
Flabellum laciniatum, Duncan, Proc. Roy. Soc. XVIII. 1870, p. 293: Trans. Zool. Soc. VIII. 1874, p. 323, pl. 
xxxix, figs. 11, 14-18. 
Flabellwm laciniatum, Lindstrom, Svensk. Ak. Handl. XIV. pt. ii. 1876, No. 6, p. 12. 
Flabellwm laciniatwm, Wood-Mason and Alcock, Ann. Mag. Nat. Hist., Dec. 1891, p. 450, fig. 15. 
Corallum extremely thin and fragile, elegantly fan-shaped with a well- 
defined but short scar-like pedicle, the calicular margin deeply cut into twelve 
