75 



Caenopgamniia ehrenbergiana, M. Edw. and H. 

 Pocillopora damicornis, Esper. 



,, hemprichii, Ehr. 



,, favosa, Ehr. 



,, verrucosa, Ell. Sol. 



Galaxea bougainvillei, M. Edw. and If. 



,, irregularis, M. Edw. and IT. 

 Mussa radians. 

 Leptoria tenuis, Dana. 

 Ceeloria arabica, Elilnz. 



,, ,, var. subdentata. 



Hydnophora conicolobata, M. Edw. and U. 



,, lobata, Lamk. 



„ niicroconus, Lamk. 



Favia ebrenbergi, Klilnz, var. 

 ,, asp era, M. Edw. and II. 

 Goniastrtea (undetermined species). 

 Prionastrsea (undetermined species). 

 Cyphastroea savignii, M. Edw. and H. 

 Echinopora lamellosa, Esper. 

 Fungia, sp., juv. 

 Cycloseris cyclolites, Lamk. 

 Heteropsammia coctilea, Spengler. 

 Pavonia, sp. 

 Psanamocora acerosa, Brugemann. 



The majority of these stony corals belong to the class of 

 * reef corals,' but a few species are included, e.g., Cycloseris 

 cyclolites and Heteropsammia cochlea, which were dredged in 

 deep water, where the reef-builders were absent, and the 

 young Fangice, which were dredged from the muddy bottom 

 of the Pdmban Pass. All the specimens of H. cochlea exhi- 

 bited a hole bored by a sipunculid worm {Asjyidosiphon)^ 

 which is always found living within this coral. It is diffi- 

 cult, as Semper points out,^ to understand what advantage 

 each animal can derive from their association ; yet some 

 must exist, for a coral is never found without a worm. 



The fact is drawn attention to by Dr. Martin-Duncan, in 

 his report ^ on the Madreporaria of the Mergui Archipelago 

 collected by Dr. Anderson, as being very remarkable that 

 "the Coral-fauna of Ceylon, so far as it is known from 

 Mr. Stuart 0. Eidley's researches,' does not contain a single 

 Mergui species. The number of genera common to the two 

 areas is, however, great, and many species are closely allied." 



1 " Animal Life." Internat. Science Set:, 1881. 

 * Journ. Linn. Soc, Nov. 13, 1886. 

 s Ann. Mag. Nat. Sist., 1883. 



