TERTIARY CORALS. 63 
Srction—MADREPORARIA PHERFORATA. 
Famity—PORITID.. 
Sub-family—P orit1n &. 
Genus—PorITEs. 
Poritus panicea, Lonsdale.’ Plate X, figs. 8—10. 
The corallum is flat and encrusting, and its upper surface is irregular. 
The calices are small, circular, and either crowded or rather distant. In the first 
instance, the outer margins of the septa are in close contact, and in the second there is 
more or less granular coenenchyma between the calices. 
The calices vary in the depth of their fossz, but the septa are always thick externally 
and thin internally ; they are granular superiorly and laterally. There are six large and 
six small septa; the largest are connected by pali with a solid columella. All are rather 
exsert. 
The longitudinal section shows the corallites to be deep, to have some endotheca, to be 
very porose, and to be united by a coenenchyma of very distinct cells. The amount of 
this coenenchyma varies according to the approximation of the corallites. 
Height of corallum ths inch. Diameter of calices 4th inch. 
Locality. Bracklesham. In the Dixon Collection in the British Museum. 
There can be no doubt about this coral possessing a granular coenenchyma, a colu- 
mella, and pali. It is not the Astrea panacea of Michelin,’ which is really an Astreo- 
pora, having neither columella nor pali. The Porites panicea has more lamellate septa 
and a more decided ccenenchyma than the other species of the genus, and it unites the 
genera Astreopora, Porites, and Litharea. The species has no resemblance to the Porites 
incrustans, Defrance, from the Miocene of Turin, nor has it close alliances with any of the 
recent forms. 
1 «Dixon, ‘Geol. and Foss. of Sussex,’ pl. i, fig. 7. 2 Michelin ‘Iconogr.,’ pl. 44, fig. 11. 
3 Pictet, ‘ Paléont.,’ vol. iv. 
