1893.] A. Alcock — Newly -recorded Corals from the Indian Seas. 147 



21. Rhodopsammia socialis, Semper. 



Rhodopsammia socialis, Semper, torn, cit., p. 260, taf . xx. fig. 1-14. 



Several specimens were dredged along with R. carinata, both in 

 the Andaman Sea and off Ceylon. Among them is a specimen showing 

 budding to the third generation. 



FAMILY EUNGrlD^E. 



Cycloseris Edw. & Haime. 



22. Cycloseris mycoides, n. sp. PI. V, fig. 10. 



Corallnm almost circular, gently convex, with a flat or slightly 

 concave base, from the centre of which close-set, equidistant, alternately, 

 unequal costaB radiate — the larger ones being finely lamellar, while the 

 alternate smaller ones are composed of a single series of fine granules. 



The septa, which are in seven very regular and complete cycles, are 

 close-set and convex, with very finely and evenly denticulate edges and 

 very finely and striately granular surfaces. Those of the first two 

 cycles are of equally predominant size and touch the columella, while 

 those of the last two cycles do not reach half-way to the columella. 

 Those of the fifth cycle unite together in each quarter-system in front 

 of their quaternary, the united pairs then showing a tendency to fur- 

 ther unite in each half -system in front of their tertiary. 



The central fossa is long, narrow, and moderately deep, and lodges 

 a narrow loosely reticulate columella. 



The synapticulas are numerous and coarse. 



In an average specimen the major diameter of the corallum is 23"5 

 mm., and the minor diameter 23 mm. 



Dredged by Professor Wood-Mason in the Andaman Sea. 



This species differs from Cycloseris cyclolites, with which I have 

 compared it, in the much greater delicacy regularity and symmetry of 

 all its parts : it appears to be near Cycloseris sinensis, Edw. & H., and 

 Cycloseris discus, Quelch. 



Diaseris, Edw. & Haime. 



23. Diaseris distorta, Edw. & Haime. 



Diaseris distorta, Milne Edwards and Haime, Hist. N"at. des Corall., 

 vol. iii. p. 55, pi. D. 12, fig. 4. 



Several specimens were dredged by Professor Wood-Mason in the 

 Andaman Sea. 



24. Diaseris freycineti, Edw. & Haime. 



Diaseris freycineti, Milne-Edwards and Haime, Hist. Nat. dcs 

 Corall., vol. iii. p. 55 ; and Semper, Zeifcschr. Wiss. Zool., vol. xxii., 

 1872, p. 269, taf. xxi. fig. 1. 



