CORALS FROM THE SILURIAN FORMATION. 277 



denticulations. Diameter of the branches two or three lines ; large diameter of the calices 

 about one fourth of line ; small diameter about one eighth. 



Dudley. Sir Roderick Murchison has found it at Wenlock, Ledbury, Lincoln Hill, 

 and Coalbrook Dale, Nasch Scar, Presteign, Abberley Hills. Aymestry, Herefordshire 

 (M'Coy). Russia (Eichwald). 



This species is well characterised by its prominent mammilar calices, and by the peculiar 

 form of their terminal aperture. C.fruticosus} found by M. Steininger in the Devonian 

 formation of the Eifel Mountains, to which Mr. Lonsdale referred this coral, much 

 resembles it in its general form, but differs from it by the oblique direction of its calicular 

 apertures. 



3. Ccenites linearis. Tab. LXV, fig. 3. 



CffiNiTES linearis, Milne Edwards and Jules Haime, Pol. Foss. des Terr. Palseoz. (Arch. 

 du Mus., vol. v), p. 302, 1851. 



Corallum massive, convex or subgibbose, and composed of thin superposed layers. 

 Calices closely set, not prominent, or but very slightly so, linear, with their margin very 

 obscurely denticulated, about half a line broad and one twelfth in the contrary direction. 



Dudley. Collection of Mr. Fletcher. 



This species differs greatly from the preceding ones, by its massive form, and its com- 

 pletely linear calices. 



4. Co3Nites labrosus. Tab. LXV, figs. 6, 6a. 



Ccenites labrosus, Milne Edwards and Jules Haime, Pol. Foss. des Terr. Palseoz. (Arch, 

 du Mus. vol. v), p. 302, 1851. 



Corallum lamellar, cyathoid, and pedunculated; its under surface granulose, and 

 resembling that of a rasp ; each tubercle being terminated on its upper side by an almost 

 semilunar aperture, the under lip of which is prominent, slightly emarginated in the 

 middle, and almost covers the aperture. The medial denticulations of the upper lip not 

 much developed ; breadth of the calices about one third of a line. The upper surface is 

 completely covered by extraneous matter in both specimens that we have seen. 



Dudley. Collection of Mr. Fletcher. 



This coral differs from all the other species of the same genus in general form, and 

 in the peculiar disposition of the under lip which hides the marginal denticulation of its 

 calices. 



1 Limaria fruticosa, Steininger, Mem. Soc. Geol. de France, vol. i, p. 339, 1831. 



37 



