MADEEPORAEIA OF THE DEEP SEA. 243 



not bilobed, but ragged on their inner margin ; and the largest are before the tertiary 

 septa. There are four cycles of septa, and many members of the order of the fifth 

 cycle. 



Height of corallum | inch ; breadth of calice -^ inch. 



Mediterranean. Coral zone. 



Genus Flabellum. 

 Flabellum minus, sp. nov. (Plate XLV. figs. 10-13.) 



The corallum has a distinct base of attachment and is cylindro-conical and compressed 

 superiorly. The epitheca is well developed, and is marked by close curved lines in 

 festoons, which meet along longitudinal linear grooves that correspond with the inter- 

 laminar space of each septum. The calice is elliptical, not deep, and the margin is 

 sharp and thin. There are 16 septa, there being six primaries, six secondaries, and 

 the tertiaries only developed in four half systems at the opposite ends of the long axis. 

 The septa are wide apart, thin, granular, and slightly exsert. 



The height of the corallum is -f^, and breadth of calice ^o inch. 



Locality: 2nd exped. 'Porcupine,' 996 fathoms, No. 16 dredging. 



This small Flabellum may not be full-grown ; but its broad base (for its size) larger 

 than that of the full-grown specimens of Flabellum distinctum, and its low septal 

 number, when of the same size as the young of that species, indicate a satisfactory 

 specific difference. 



The species has some structural resemblance to Flabellum woodsi of the Crag, espe- 

 cially in the lines on the outside, which corresponds with the middle of the septa ; but 

 probably its nearest ally is Flabellum sicih'ense, Ed. & H., of the Sicilian Tertiaries. 



Genus Gemmulateochus, gen. nov. 



The corallum is compound, is fixed by a broadish base, and is conico-cylindrical in 

 shape. The wall is thick; and there is a well-marked epitheca, the costse being rarely 

 visible. The calice is very deep ; and there is a rudimentary columella. The septa are 

 stout. Budding takes place from the wall high up; and the buds ascend and fre- 

 quently join by their walls to others of different corallites, so as to constitute a bush- 

 shaped corallum. 



Gemmulateochus simplex, spec. nov. (Plate XLV. figs. 18-20.) 



The parent corallite bears buds on opposite sides ; it has a slight constriction above 

 the base of attachment, a well-developed epitheca, and a rather elliptical calice. The 

 septa are distinct, stout, granular, and short, not reaching far inwards ; there are six 

 systems; and the fourth cycle is incomplete in all but one. The primaries are the 



VOL. X. — PAET V. No. 2. — March 1st, 1878. 2 m 



