368 Mr. P. W. Bassett-Sraith 07i 



LithophylUa, 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, costse echinulate. 



Tizard Bank, depth 26 fath. 



Genus Thidacophyllia, Blainville. 



Tridacophyllia cervicornisy Moseley. 



1881. Tridacophyllia cervicornis, Moseley, Ohall. Report, Zool. vol. ii. 

 p. 183, pi. X. figs. 2, a, b, c, Ba. 



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 costge 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 O. 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. 



