78 



PEOP. P. MAUTiN Duncan's eevision oe the 



trichotomous. The base increases but slightly with age, and the 

 corallites grow high, subcylindrical, and increase by fissiparity, 

 separating soon. The calices are large and do not form series. 

 The columella is lamellary. The septa are large, thin, and entire. 

 The costse are crestiform, and are visible to the base. There is an 

 endotheca, but the epitheca is absent. 

 Distribution, — Fossil. Oolite of Europe. 



Grenus Solenosmtlta, Duncan, Madreporaria of Deep Sea, Trans. 

 Zool. Soc. vol. viii. pt. 5, p. 327 (1871). 



The colony is bush-shaped, and the corallites, which rarely 

 unite, are cylindrical and bifurcate. Budding occurs, and after- 

 wards fission of the terminal calices : their fossae and columellae 

 are in common. The tissue between these calices is costulate, and 

 that over the rest of tlie corallum granular and without epitheca. 

 The calices increase by fissiparity, and occasionally form short 

 series. Columella formed of laminae and of the palif orm ends of 

 septa, and is deeply situate. Septa variable in number ; many 

 reacb the columella and have paliform lobes. Dissepiments 

 common. Wall often thick. 



Distribution. — Becent. N.E. and S. Atlantic, Caribbean Sea, 

 South Indian Ocean, Philippines, Japan. To 1098 fms. 



Tribe II. 



Grenus T)A.^xvuY-LhiK, Milne-Edwards^ Jules Haime, Qompt. Bend, 

 de VAcad. des Sci. t. xxvii. p. 432 (1848) ; Ann. des Sci. Nat. 

 3^ ser. t. X. pi. 8. fig. 5 (1849). 



The colony is fasciculate, and resembles a more or less hemi- 

 spherical, dichotomous cyme in shape. Tbe corallites grow 

 upwards, divide fissiparously, and become free to a considerable 

 extent rapidly. The calices are circular, suboval, or deformed, 

 moderately deep, and there is a spongy columella. The septa are 

 exsert and dentate, the inner teeth being larger than the outer 

 ones. The endotheca is well developed. The wall is echinulate 

 and costulate, and gives rise to circular expansions. The epi- 

 theca is rudimentary. 



Distribution. — Fossil. Tertiary of Sind and Miocene of Europe. 

 — Becent. East Indies, Malacca. 



Grenus Calamophtllia, Milne-Edwards ^ Jules Saime, Hist, 

 Nat. des Corall. vol. ii. p. 342 (1857). 



The colony is fasciculate, and the corallites are long and 



