MADREPORARIA OF THE DEEP SEA. 333 
Section PERFORATA. 
Family Madreporaria. 
Subfamily EupsaAMMIIN&. 
Genus BALANOPHYLLIA, Searles Wood, Ann. Mag. Nat. Hist. 1844. 
BALANOPHYLLIA GADITANA, Duncan. 
The corallum is claviform and cylindrical, and has a rounded base, with a scar of 
former adhesion. The epitheca exists here and there. 
The coste are subequal and flat. 
The calice is circular in outline, and is very deep centrally. 
The septa are unequal, thick, and irregular. The smallest join the others near the 
calicular margin; others unite midway to the columella to the internal edge of the 
large septa. 
There are four incomplete cycles of septa in six systems. 
The columella is very small, and is situated deeply. 
Height of corallum 385 inch; breadth of calice 75 inch. 
Dredged in No. 29 station, and in 227 fathoms. The specimen was dead, and had 
been so for some time. 
BALANOPHYLLIA CELLULOSA, Duncan. (Plate XLIX. figs. 11, 12.) 
The corallum is subturbinate and curved. There is a very small scar of former 
attachment. The epitheca is well developed, and extends up to the calicular margin, 
and it gives the sharply granular character to the subequal cost. 
Coste very distinct at the base and elsewhere. 
The calice is circular in outline and not deep. The columella is cellular and small, 
and does not project. 
The septa are few in number. The primary septa are large, thick, exsert, and consist 
of cellular tissue. The other septa are represented by trabeculz, so that the cyclical 
arrangement cannot be discovered. 
Height of corallum 4 inch; breadth of calice 3%5 inch. 
Dredged up, somewhat injured, from 292 fathoms, No. 24. The specimen figured 
was probably alive when dredged up. 
The epitheca, which is strongly developed in some species of the genus, affords but 
secondary characters for differentiation; consequently the genus must include Theco- 
psammia of Pourtales. 
BALANOPHYLLIA SOCIALIS, Pourtales, sp. (Plate XLIII. figs. 14-19.) 
Thecopsammia socialis, Pourtales. 
This species has been described by Pourtales, under the generic name of Theco- 
