Ix BRITISH FOSSIL CORALS. 
Family IX. 
FAVOSITID. 
Corallum essentially formed by lamellar walls, with little or no ccenenchyma. Visceral 
chambers divided by numerous and well-developed complete tabulz. 
First Tribe—FAVOSITID Ai. 
Corallum massive. Wadls perforated. Septa rudimentary. No cenenchyma. 
1. Genus FavositEs, 
Lamarck, Hist. des An. sans Vert., vol. ii, p. 204, 1816; Calamopora, Goldfuss, Petref. Germ., 
vol. i, p. 77, 1826-30. 
Corallum composed of basaltiform corallites, and having a basal plate covered with an 
epitheca, and no radiciform appendices. Ca/ices at right angle with the axis of the corallite, 
and in general hexagonal. ails perforated in a very regular manner. Zadw/@ horizontal, 
and very regularly superposed. No canenchyma. 
Typ. sp., Favosites Gothlandica, Lamarck, loc. cit., p. 206. 
2. Genus MIcHELINIA. 
De Koninck, Deser. des Anim. foss. des Terr. houilliers de la Belgique, p. 30, 1842-44. 
Corallum having a basal plate with radiciform prolongations. Zadule very irregular, 
and subvesicular. ‘The other characters as in Favosites. 
Typ. sp., Michelinia tenuisepta, De Koninck, loc. cit., pl. c, fig. 3 a, 6. 
3. Genus KONINCKIA. 
Milne Edw. and J. Haime, Comptes rend., t. xxix, p. 260, 1849. 
Corallum resembling Favosites, but having the walls larger and less regular, and the 
septa constituted by series of distinct and spiniform processes, interrupted at certain 
distances by the tabule, which are horizontal. 
Typ. sp., Koninckia fragilis, Milne Edw. and J. Haime, loc. cit. 
4. Genus ALVEOLITES. 
(Pars) Lamarck, Syst. des An. sans Vert., p. 375, 1801 ; Steininger, Mem. Soc. Geol. France, vol. i. 
Corallum composed of superposed strata of corallites very similar to those of Favosites, 
