238 BRITISH FOSSIL CORALS. 
Found at Torquay. 
In the Collections of Dr. Battersby and Mr. Pengelly. 
This species resembles A. /imitata’ in having the inner wall rudimentary, and indicated 
only by a thickening of the septa; it differs from it, as well as from the other Acervularia, 
by the great number of the septa. 
4. AcERVULARIA PENTAGONA. ‘Tab. LIT, figs. 5, 5a, 54. 
CYATHOPHYLLUM PENTAGONUM, Goldfuss, Petref. Germ., vol. i, p. 60, tab. xix, fig. 3, 1826. 
FaVASTREA PENTAGONA, De Blainville, Dict. Sc. Nat., vol. Ix, p. 340, 1830.—Man., p. 375. 
CYATHOPHYLLUM PENTAGONUM, Morren, Desc. Corall. Belg., p. 56, 1832. 
— — Milne Edwards, 2d ed. of Lamarck, vol. ii, p. 430, 1836. 
ASTREA PENTAGONA, Lonsdale, Geol. Trans., 2d ser., vol. v, pl. 57, fig. 1, 1840. (Not fig. 1a.) 
—_ — Phillips, Paleeoz. Foss., p. 11, pl. vi, fig. 15, 1841. 
ACERVULARIA PENTAGONA, Michelin, Icon., p. 180, pl. xlix, fig. 1, 1845. 
_— ANANAS, Idid., p. 180, pl. xlvii, fig. 1. 
LITHOSTROTION PENTAGONUM, D’ Orbigny, Prod., vol. i, p. 106, 1850. 
ACERVULARIA PENTAGONA, Milne Edwards and Jules Haime, Pol. Foss. des Terr. Paleoz., 
p. 418, 1851. 
— — M‘Coy, Brit. Paleeoz. Foss., p. 91, 1851. 
Corallum forming. an astreiform mass. Corallites somewhat unequal in size, polygonal, 
their great diagonal measuring in general about 2 lines, and the diameter of the immer 
walls about half a line. Sepfa (18 to 24) subequal, slender, and almost straight. The 
lines of demarcation between the corallites slightly zigzagged. 
Found at Torquay and at Ogwell. Prof. Phillips mentions having met with this 
species at Newton Bushel, Sharkham Point, and Babbacombe. It is found also in the 
Eifel, and in the province of Limbourg. 
In the Collections of Messrs. Bowerbank and Pengelly. 
This is the smallest species of Acervularia known, and that in which the septa are the 
least numerous. 4. coronata,’ to which it bears most resemblance, differs from it by the 
great inequality of the septa. 
5. ACERVULARIA LimiTaTa. ‘Tab. LIV, fig. 1. 
ASTREA PENTAGONA (pars), Lonsdale, Geol. Trans., 2d ser., vol. v, pl. lviii, fig. la, 1840. 
(Not fig. 1.) 
ACERVULARIA LimiItaTa, Milne Edwards and Jules Haime, Pol. Foss. des Terr. Palzeoz., 
p. 419, 1851. 
A polished slab of this coral shows that the corallites are circumscribed by well-marked _ 
zigzagged polgyonal lines. ‘he inner walls are, on the contrary, but slightly marked, 
‘ Tab. liv, fig. 1. 2 Tab. lil, fig. 4. 
