MADREPORARIA OF THE DEEP SEA. 327 
Srv. Diplohelia meneghiniana, Seguenza. 
doderleiniana, Seguenza. 
sismondiana, Seguenza; and all other Diplohelie with costal striz. 
Branches irregular, and often coalescent. 
Columella moderately well developed. 
Septa in three cycles in six systems. 
Costal striations distinct, long, sinuous, general and often granular. 
Variety «. Septa, especially of third cycle, dentate. 
Variety 8. Surface of wall very aciculate, with granules on the coste. 
Variety y. Costal striz interrupted, and also continuous and curved. 
Variety 5. With exsert septa. 
The question now arises, in which family must the Amphihelie be placed? 
Are they Oculinide? Have they dissepiments? Are there any proofs forthcoming 
that the corallites fill up within ? 
It is very evident that the walls of the bud thicken immensely; but I cannot detect 
in any instance any diminution of the original calibre of the visceral cavity by a deposit 
of any kind. Yet this is a necessary characteristic of the Oculinide. 
The ragged condition of the septal edges is evidently an occasional peculiarity in the 
Amphihelie. 
The Amphihelie, having no infilling of the visceral chamber, no dissepiments and no 
pali, and haying solid walls and septa, which are usually not dentate, must be allied 
with such simple forms as Ceratotrochus, Conotrochus, and Desmophyllum amongst the 
Turbinoliide. 
From the presence of a columella, the Amphihelie may be regarded as Ceratotrochi 
and Conotrochi which increase by marginal gemmation. 
The next species to be described is very remarkable, not only for the great depth at 
which it lives, but also for the size and blue tint of some of the specimens. 
Family Astreide. 
Division EupHyLLIAcEs, Milne-Edwards & Jules Haime, Hist. Nat. des Corall. 
vol. ii. p. 183. 
Section EUPHYLLIACE® CHSPITOSA. 
Genus SOLENOSMILIA. 
Genus noy. The corallum is bush-shaped; and the corallites, which rarely unite, are 
cylindrical and bifurcate. The terminal calices are produced by a bi-gemmation; and 
their fossze and columelle are in common. The tissue between the new calices is usually 
VOL. Vill.—ParT y. March, 1873. 3A 
