107 



This species appears to be very nearly related to F. transversale 

 Moseley (Challenger, Deep-Sea Madreporaria, p. 174, PI. VI, Fig. 6). 

 Another species to which it is closely related is F. fastigatum 

 Deunant (Trans and Proc. Roy. Soc. S. Australia, XXIII. 1898 — 99, 

 p. 113, PI. II, Fig. 2a— b) f'rom the Tertiaries of Victoria. 



25. Flabellum Weberi n. sp. 



This species is very closely related to F. rubrum, Q. & G. 

 Corallum firmly fixed by a broad-based pedicle ; it is compressed, 

 and slightly curved in its broader plane. There are no costse, 

 but the upper part of the wall is marked with wavy accretion 

 lines. The major axis of the calicnlar orifice, which is ou a 

 considerably lower plane than the minor, is to the latter as 22 

 is to 12. 



Calicular fossa deep. Septa in six systerus and five complete 

 cycles; those of the first two cycles (12 in number) are equally 

 enlarged, being nearly twice as wide as those of the third cycle; 

 those of the fourth cycle, though they are very thin and narrow, 

 descend^ deep into the calicular fossa and are plainly visible 

 without a lens; those of the fiftb cycle, though they descend 

 halfway or more down the calicular wall, are so fine and narrow 

 that they are not easily seen without a lens. 



The columella, which is very deep-seated, is formed of processes 

 from the united ends of the septa of the first three cycles. 

 Greatest height of corallum 27 millim. 

 Major diameter of calicle 22.5 » 

 Minor » » » 12.5 » 



From F. rubrum this species differs in the forni of the corallum, 

 which is higher and less compressed, and in having the septa of 

 the third cycle much smaller than those of the first and second 

 cycles ; so that instead of an appearance of 24 equal loculi each 

 divided into 4 compartments, there are only 12 loculi each divid?d 

 into 2 compartments which are again divided into 4. It is, however, 

 very closely related to the New Zealand species. 



