368 
Mr. P. W. Bassett-Smith on 
Lithophyllia , sp. 
A living specimen, but much broken. It has a wide 
surface of attachment ; the coral is short, subcircular, and 
widely expanded ; septa in four cycles, upper margins den- 
tate or lobate and finely crenulate, costae echinulate. 
Tizard Bank, depth 26 fath. 
Genus Tkidacophyllia, Blainville. 
Tridacoptiyllia cervicornis , Moseley. 
1881. Tridacophyllia cervicornis , Moseley, Chall. Report, Zool. vol. ii. 
p. 183, pi. x. figs. 2, a, 6, c, B a. 
A single specimen, living, 11 millim. in height by 9 in 
width, growing attached by a spreading base and short 
peduncle. 
From the Tizard Bank, depth 50 fathoms. 
This is the first time that a locality and depth have been 
recorded for this species, these not being known for the type 
form described by Moseley. 
Genus Galaxea, Oken. 
Galaxea cequalis , sp. n. 
Corallum forming extended masses with flattened or slightly 
convex surfaces. Calices very regular in height and distance 
from each other, circular, subcircular, or slightly compressed, 
so as to become subpolygonal, from 3’5 to 5 millim. in 
diameter at the summit. From twenty to twenty-four septa 
in three cycles, the septa varying in size according to 
the cycle, thick at the peripheral margin, becoming thin 
towards the free internal margins, strongly exsert. Low 
down the septal margins unite and form a perforate pseudo- 
columella. Lateral surfaces of the septa with numerous 
minute spines. The costse formed by the peripheral margins 
of the septa, which can be distinguished individually. The 
calices are only from 1*5 to 2 millim. apart, and they project 
about 10 millim. above the platform of the coenenchyma. 
The vesicles of the coenenchyma small, from *5 to *75 millim. 
apart ; at intervals compact platforms appear to be formed 
which grow over the former surfaces. 
This species is allied to G. Esperi , Schweig., and G . 
Ellisii, E. & H., but is distinguished by the close arrange- 
ment of the corallites and their short extension above the 
coenenchyma. 
