RED SEA AND EGYPTIAN PORITES. 241 
into conspicuous nodules. Quite near the surface they become less marked, and the actual 
surface seems composed of a loose, open, streaming reticulum. The texture of the lateral 
calicles is quite flaky, the walls being built of flakes, arranged parallel, or at small angles, with 
the surface; the flakes are all pierced with round holes, and from their surfaces a delicate 
trabecular, slightly nodulated thread-work arises and forms the semi-reticular wall ridges, and 
the septa, which are thin with interrupted edges, and very perforated. The flakes are again seen 
in the columellar tangle. The pali and the columellar tubercle are small and inconspicuous. 
The interseptal loculi are neat, and form a symmetrical ring of deep oval holes (see Pl. XXXIII. 
fig. 9; cf. the same feature in Porites Red Sea 1 and 2). 
I find these same features recorded in my notes of the Paris specimens, and they may be 
taken as definite structural characters of this form. 
Dr. Klunzinger found it not uncommon in deep hollows under the surf, and on the outer 
slopes of the reef. 
a, A fragment obtained from Dr, Klunzinger. Zool. Dept. 86. 10. 5. 39. 
252. Porites Red Sea (96. (P Lrythree sexta.) 
[Red Sea; Stuttgart Museum. ] 
Syn. Synarea lutea Klunzinger, Die Korallthiere des Rothen Meeres, ii, (1879) p. 49, pl. vii. fig. 4, 
pl. v. fig. 29. 
Description—The corallum is encrusting, with here and there smooth free edges 
supported by well developed epitheca, The surface is wavy, and raised into coenenchymatous 
ridges, which run in wavy tracts like veins. 
The calicles are ill defined, with however, conspicuous rings of pali which are 0°5-0°75 mm. 
across, very numerous, not developed on the coenenchymatous ridges, and not in rows. The 
septa meet and fuse, and the pali are coarse and V-shaped, with conspicuous interseptal loculi 
running into the small open fossa, or over the wall, among the rough finely echinulate granules 
which cover the surface. | 
The original specimen of this coral, described and figured by Dr. Klunzinger, is in the 
Stuttgart Museum ; it is 20 cm. long, and the surface is crumpled so as to rise from 1-3 cm. 
There appears to be only one specimen known. 
It differs in the characters of its ccenenchymatous upheavals from any other known 
ceenenchymatous Porites. (For other forms, see Table IV.) 
253. Porites Red Sea (g)7. (P. Erythrew septima.) 
[Near Koseir, coll. Klunzinger; Berlin Museum. ] 
Syn. P. echinulata Klunzinger, Die Korallthiere des Rothen Meeres, ii. (1874) p. 43, pl. v, fig. 18. 
Description.—The stocks are explanate, very small, 1*5-3 cm. diameter, with free edges ; 
the centre somewhat gibbous; the edge is 1-2 mm. thick and supported by epitheca. 
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