OF THE MEBGUI ARCHIPELAGO. 17 



COSCIXAR^A MOXILE. 



Madrepora monile, Forskal, op. cit. p. 133. 



Coscinarsea monile, Klunz. op. cit. pt. iii. p. 79, Taf. ix. fig. 4, and 

 Taf. x. fig. 17 a & b (Durchschnitte). 

 Locality, Mergui Archipelago. 



Family PLESioPORiTiDiE, Dune. Revis. p. 165. 



Genus M^iandroseris (pars), Rousseau. 

 IVLeandroseeis Bottj?. 



Maeandroseris Bottae, Rousseau, Voy. au Pole sud de Dumont d'Urville, 

 Zool. t. v. p. 121, Zooph. pi. 28. fig. 1 (1854). 

 Locality, Mergui Archipelago. 



Section MADREPORARIA PERFORATA, Ed. $ H. 

 Family Eupsammid^e, Dune. Revis. p. 172. 



Genus Balanophtllia, S. Wood. 



Balanophyllia mergtjiexsis, sp. nov. (Plate I. figs. 25, 26.) 



The corallum is small, short, rather higher than broad, nearly 

 cylindrical, being slightly compressed. Calice elliptical and 

 larger than the base, and deep. Septa numerous and crowded, 

 in incomplete five cycles. Primaries and secondaries equal, 

 thin, plain at the margin of the calice and with ragged edges 

 elsewhere and near the columella. The tertiaries have a tall, 

 stout, serrated swelling near the columella, joined by the higher 

 orders. These large projections form as it were a paliferous 

 crown around the columella, and this is deeply seated, long and 

 narrosv, and trabeculate. Costse nearly equal, with a single row 

 of short rounded granulations, often wavy, narrow, bifurcating, 

 and not much projecting. Intercostal spaces minutely and 

 regularly perforated. Epitheca rudimentary. 



Height of corallum 8-9 millim. ; breadth of calice 5*5 millim., 

 length 7 millim. Locality, Mergui Archipelago. 



Genus Dendrophtllia, Ed. Sf H. 



Dekdrophyllia coarctata, sp. nov. (Plate I. figs. 27, 28.) 



The colony is moderately tall, with a broad base, and consists 

 of corallites of various sizes and of different ages ; parent coral- 

 lite not usually detected. Some buds arise close to the base 



LIN2J. JOURN. — ZOOLOGY, VOL. XXI. 2 



