6 Messrs. J. Wood-Mason and A. Alcock on 



septa of the third cycle are in general barely one fifth the 

 breadth of the septa of the first two cycles ; they descend to 

 the bottom of the calicle. The septa of the fourth cycle, 

 which reach just over halfway down the calice wall, are still 

 narrower, and those of the fifth cycle, which end quite in the 

 upper part of the calice, are mere ridges. 



Height of corallum from base to calicular margin '15 inch ; 

 longitudinal diameter of calicular orifice "95 inch ; transverse 

 diameter of calicular orifice *70 inch ; depth of calicular fossa 

 '55 inch ; length of longest rootlet 55 inch. 



From the Eastern Telegraph Co/s cable, in the neigh- 

 bourhood of Gaspar Straits. One specimen. 



Rhizotrochus Womleyi differs from the other known species 

 of the genus most conspicuously in its irregularity, which is 

 shown in the shape of the corallum and in the size and 

 arrangement of the principal cycles of septa. Further, the 

 rudimentary parietal columella appears to be characteristic] 



Caryophyllia, Stokes. 



2. Caryophyllia communis, Moseley. 



Caryophyllia communis, Moseley, 'Challenger' Reports, vol. ii. pt. vii. 

 pp. 135-138, pi. i. figs. 4 and 5 ; Pourtales, Bull. Mus. Comp. Zool. 

 vol. vi. p. 100, pi. i. tigs. 12 and 13. 



This species, which the ' Challenger ' and the ' Blake ' 

 have found to have an extended range over the Atlantic 

 Oceans, was taken by the ' Investigator ' in 1000 fathoms off 

 the Elicapeni Bank in the Laccadive Sea. Over two hundred 

 large specimens, more than half of them living, came up in 

 a single haul of the trawl. 



Many of the dead coralla were incrusted with siliceous 

 sponge. 



3. Caryophyllia ejjhyala, sp. n., Alcock. 



Attached by a broadish base to some loose spicules from 

 the anchor-rope of a Hyalonema. 



The corallum, which is thin and entirely invested with a 

 vitreous epitheca, is goblet-shaped, the short cylindrical 

 peduncle being constricted immediately above the base of 

 attachment and then rather suddenlyexpandingintoa slightly- 

 curved turbinate calice with a broadly elliptical mouth. 

 Costae extending from calicular margin to base, faint, sub- 

 equal, slightly wrinkled. 



Septa in four complete cycles, exsert, especially those of 

 the coequal first and second cycles, beautifully crimped. A 



