248 BRITISH FOSSIL CORALS. 
This species is of a more regular discoidal form than any others of the same genus. 
P. porpita,’ which is also very flat, differs from it by the septa being alternately large and 
small. 
3. Patawocycius Fiutcuert. Tab. LVII, figs. 3, 3a, 3b, 3c, 3d, 30, 3f. 
Patmocycius Fietcuert, Milne Edwards and Jules Haime, Pal. Foss. des Terr. Paleeoz. 
(Arch. du Mus., vol. vy), p. 205, 1851.—Ann. des Sc. Nat., 
3d ser., vol. xv, p. 111, 1851. ‘ 
Corallum very short, but of a subturbinate form, with a short, strongly curved 
peduncle, a thick epitheca, and some well developed accretion wrinkles. Ca/ice circular, 
or almost so, with a somewhat deep cavity, and a lamellated edge. 36 or 38 principal 
septa, alternating with an equal number of small ones; somewhat thick, closely set, not 
tall, and scarcely exsert; their edge slightly convex, and provided with rather strong 
denticulations, which, closely set exteriorly, become more distant towards the centre, and 
scarcely ever form a double row on the same septum. Diameter of the calice about 8 
hnes ; height of the corallum about 4 lines. 
In the young specimens the peduncle is more developed proportionally. In an aged 
individual, that measured almost 12 lines in diameter, and that does not appear to differ 
specifically from the former, the marginal denticulations of the principal septa are almost 
obsolete exteriorly. 
Dudley. Collections of Mr. T. W. Fletcher, and of M. Bouchard-Chantereaux 
(Boulogne). 
By its general form, this species is intermediate between P. porpita® and P. rugosus 3 
its septa are also more numerous and more strongly denticulated than in either of these 
fossils. 
4. Pauaocycius rucosus. Tab. LVI, figs. 4, 4a, 44, 4c, 4d. 
PaLmocycus RuGOosUS, Milne Hdwards and Jules Haime, Pol. Foss. des Terr. Paleeoz. (Arch. 
du Mus., vol. v), p. 206, 1851.—Ann. des Sciences Nat., 3d ser., 
vol. xv, p. 111, 1851. 
Corallum cylindro-turbinate, sometimes rather elongate ; its basis subpedunculated, much 
bent, and compressed ; epitheca thick, and presenting strongly developed accretion wrinkles, 
which are very oblique near the basis. Cadice circular, with a large, and somewhat deep 
cavity. Principal septa (26 or 28) alternating with an equal number of small ones; 
somewhat thick, with their edges regularly denticulated, and slightly arched interiorly. The 
” See tab. lvii, fig. 1. 2 See tab. lvii, fig. 1. 3 See tab. lvii, fig. 4. 
