118 



PEOF. P. MAETIIT DTJNOAN's EEVISION OF THE 



spaces in whicli there may be small costse. Very spinulose. Cali- 

 cular fossa moderately deep. Columella subpapillary. Septa 

 exsert, with the free edge very incised. Steroplasma filling much 

 of the calice with age. 



Distribution, — Becent. Indian Ocean. 



G-enus Phtsophtllia. 



Colony large, spreading, pedunculate, foliaceous, folia united 

 and presenting faint broad ridges, which are crossed by septo- 

 costse, Corallites low, wide apart, arranged more or less in 

 concentric circles. Calicos distant, large, sunken, deep, elongate, 

 forming series of 2 to 4, or circular. Fossa large and deep. 

 Columella small, trabeculate. Septa large, exsert, spinulose, 

 especially near the axis, unequal, wide apart ; ending in septo- 

 costse which are confluent with those of the calices on either 

 side, and some of which pass over broad ridges radially. Inter- 

 calicular surface large, gibbous or ridged, formed of convex 

 vesicular endotheca ; this endotheca fills up the interseptal 

 loculi also, and is greatly developed. Calices on one side of the 

 colony only. Common wall inferior, costulate to the base. Costse 

 distinct, spinulose. No epitheca. Eissiparity occurs, and also 

 gemmation. 



Distribution. — Recent. Locality ? 



There is but one specimen in the British Museum of this 

 genus, but it is a very marked form. The late Mr. Brliggemann 

 gave the form a manuscript name, but did not describe it. The 

 classificatory position is doubtful, but I place it here. 



GROUP. Massive budding Astraeidae. CoralHtes united by peritheea. 

 Genus Galaxea, Ohen (1815); amended in Milne-Edwards Sf 



Jules Haime, Hist. Nat. des Corall. vol. ii. p. 223 (1857). 

 Colony fasciculate and submassive. Corallites elongate, with 

 stout walls marked with feeble costse. Calices circular or de- 

 formed. Columella absent or rudimentary. Septa usually very 

 exsert, lanceolate, often slightly granular on their sides, entire. 

 Endotheca moderately abundant. A peritheea or vesicular inter- 

 corallite growth is abundant, and joins the corallites and their 

 ends together. It reaches up to different distances from the 

 caHcular margin, so that the upper ends of the corallites pro- 

 ject above. G-emmation subbasilar and from the wall. 



Distribution. — Becent. Eed Sea, Indian Oceau, Pacific. — Sub- 

 fossil in raised beaches. 



