160 DESCRIPTION OF CORALS. 
punctured by a few minute foramina; distal extremity slightly overlying ; walls 
between the rows smooth ; thickness of coral slightly exceeding depth of cell ; 
intermediate chambers lozenge-shaped ; size variable, not dependent on position; 
concave surface ribbed, largely foraminated. 
Lamk. Animx. sans Vertb. t. il. p. 195. ed. 1816; t. il. p. 300. ed. 1836. 
Lamx. Exp. Méthod. p. 44. tab. 73. fig. 9-11. Goldf. Petref. p. 41. tab. 12. fig. 7. 
Michelin, Iconog. Zoophytog. p. 175. pl. 46. fig. 6. 
A specimen obligingly lent the describer by Mr. Edwards supplied the above 
characters, but as it was imbedded with the cellular surface downwards, and 
they were chiefly supplied by a fragment accidentally detached from the edge, 
they are necessarily very imperfect, and most probably refer to only one con- 
dition of growth. To the extent that a comparison could be attempted, the 
nearest resemblance appeared to be with Lun. urceolata, particularly as deli- 
neated by Prof. Goldfuss (Petref. tab. 12. fig. 7), whose figure represents a less 
deeply cupped or thimble-shaped outline than is usually assigned to the species, 
and therefore approached the form which the Bracklesham coral evidently pos- 
sessed in a perfect or uncompressed state. ‘The shape of the intermediate 
chambers agreed also with that given by Goldfuss (loc. cit.) and M. Michelin 
(Iconog. Zoophytol. pl. 46. fig. 6 5); and it is probable that Lamouroux’s cha- 
racter, ‘‘ pores en losange, trés-grand, disposés en quinconce” (Exp. Méthodiq. 
p- 44), was derived from an approximation to an hexagonal form in the cells, 
and from the intermediate chambers being considered also as cells. It would 
however be manifestly incorrect, from such imperfect data as the fragment 
afforded, to assign the specimen to the Paris basin species otherwise than doubt- 
fully. The coral is figured in PI. I. figs. 8,8 a, 8b, that the reader may draw his 
own conclusions. 
Two other Lunulites accompanied the above-noticed specimen, but they were 
also both imbedded with the cellular surface downwards, and their fragile nature 
did not permit the matrix to be even partially removed. The ribs on the con- 
cave surface were smoother than in the preceding case, and the foramina were 
much smaller, resembling those in Prof. Goldfuss’s figure of Lun. radiata (Petref. 
pl. 12. fig. 6). The larger specimen is represented in Tab. I. fig. 8*, 8 a*, 8 b* 
of this work ; the smaller had about half the linear dimensions, or a diameter of 
2 lines. 
