38 BRITISH FOSSIL CORALS. 
slender, closely set, projecting very little, equal, sub-vermiculate, and assuming the 
appearance of vertical striz irregularly broken at short distances, but not distinctly 
composed of granulations, as is the case in most Eupsammidee (fig. 4.@). Walls perforated, 
as usual in this family, near the calice, but becoming compact lower down. Calices 
circular, infundibuliform, rather deep, and having an obtuse edge. Colwmella quite 
rudimentary, or not existing at all. Four septal cycla, the last of which is quite 
rudimentary, whereas the others are well developed proportionably to theirage. The septa 
are very thin, closely set, not remarkably exsert, terminated by an oblique, nearly entire 
edge, and proceed in a straight direction towards the axis of the corallum, but present an 
undulate appearance, due principally to the existence of a few large lateral granule. The 
six systems are equally developed, and very distinct; the primary and secondary septa 
meet along their inner edge in the middle of the visceral chamber. Height of the 
corallites, about two or three lines ; diameter of the calices, about two thirds of a line. 
This fossil, of which we have seen but one specimen, that was found at Bracklesham Bay, 
and belongs to the cabinet of Mr. Frederick Edwards, is the only known species of the genus 
Stereopsammia. The regular radiate structure of its calice distinguishes it from most of 
the Eupsammidee, and in the genus Coenopsammia, where the same character is met with, 
the columella is essential and well developed,’ whereas in Stereopsammia it does not exist, 
or is quite rudimentary. 
Family PORITID A: (p. lv). 
Tribe PORITIN AX (p. lv). 
1. Genus LivHarma (p. ly). 
Litnara#a Wessteri. ‘Tab. VII, figs. 1, 1 a, 16, le. 
Asrrpa Wesstert, J. S. Bowerbank, on the London Clay Formation, in Charlesworth’s 
Mag. of Nat. Hist., new series, vol. iv, p. 23, figs. a, B, 1840. 
SrperastTREA WesstTERI, Lonsdale, in Mr. Dixon’s unpublished work on the Chalk Forma- 
tions and Tertiary Deposits of Sussex. 
Corallum composite, incrusting, adhering in general to large pebbles, and forming a 
thick convex mass, on the edge of which some traces of a rudimentary epitheca are 
sometimes perceptible. Multiplication by gemmation in the spaces comprised between the 
calices. Corallites sometimes united by a spongy coenenchyma; in other parts crowded 
together so as to render the calices almost polygonal, and separated only by a thin, simple, 
common margin. Calices infundibuliform, but not deep. Colwmella well developed, 
1 Annales des Sc. Nat., 3™° série, vol. x, tab. i, figs. 11, 12. 
