780 J. STANLEY GARDINER. 



47. Cyphastraea suvadivae, n. sp. 



Colony flat, incrusting, but probably showing all the regular shapes found in other species 

 of the genus, covered with round, scarcely projecting coixdlites. The latter 1 — 1"5 mm. broad, 

 from 1"5 — 3 mm. distant from one another, joined by a vesicular exotheca covered with small, 

 low, blunt spinules, which near the calices may be arranged in lines leading to the low spines, 

 which represent the costal plates. Theca scarcely raised above the exotheca around the edge 

 of the calice, the ring-form being mainly due to the slightly exsert, upper edges of the septa. 

 Latter numbering 24, those of cycle III. very thin but generally distinct, projecting half-way 

 to the columella ; those of cycles I. and II. nearly equal, with rough, .spiny .sides, giving them 

 a coarse appearance, edges bluntly notched, the inner teeth not distinguishable from the two 

 or three rough rods of the columella. Calices quite shallow, with a closed in appearance below. 

 The 'exotheca is formed by minute cell-like vesicles. In some sections it almost simulates the 

 appearance found in Galaxea, but is clearly dependent on the costae. The endothecal 

 dissepiments are very thin, close together and almost horizontal. 



The species approaches nearest to C. microphthalma, but differs in its more distant 

 calicles and much lighter and more open method of growth. 



Locality. Six small pieces from Suvadiva, 20 / They are somewhat distorted on the 

 surface with barnacles and worm tubes, and the structure underneath more or less destroyed 

 to within 4 mm. of the surface by boring animals. 



48. Cyphastraea maldivensis, n, sp. 



Colony consisting of thin, incrusting masses, but probably showing all the shapes found 

 in the genus. Corallites round, practically not projecting, not more than 1'5 mm. broad, 

 generally separated by at least two or three times their diameter from one another, joined 

 by a glabrous looking exotheca, obviously even from the surface formed by very small, flattened 

 vesicles, often with their walls incomplete on the surftice, but where complete studded with 

 low rounded granules. Costae practically non-existent, but tops of the septa a little projecting 

 over the upper ends of the calices, giving an appearance of rings slightly raised round their 

 edges. Septa 24, tertiaries distinct at edge of calice, projecting about one quarter way to 

 columella, ending perpendicularly inside with small, pointed teeth ; primaries and secondaries 

 nearly equal, rather thin, slightly exsert, a few spines on the sides, ending inside with long, 

 thick, pointed, spiny teeth, extending almost at right angles over the axial fossa, the inner 

 parts of the septa by their fusion presenting sometimes a fenestrated apj)earance. Columella 

 formed by open trabeculae from the septal edges, a quarter to a third the width of the calice, 

 sometimes with points above but never papillary. The calices, owing to the small breadth 

 of the tertiary septa, the thin septa and large columella, appear relatively open. 



The exotheca is more abundant and vesicular than it is in the last species, and still 

 more closely resembles Galaxea; the piling up of the vesicles on the surface between the 

 corallites is very distinct. The species more closely resembles the last than any other, but 

 differs in its surface appearance, thinner septa with long pointed teeth and trabecular 

 columella. 



Locality. S. Nilandu, 2.5 /, and Felidu, 20 to 25 /. 



