CORALS FROM THE DEVONIAN FORMATION. 213 



oblique, and less closely set than in the other species. The laminae of the tubes of the 

 Caenenchyma are thin, but assume the appearance of vertical hnes, much more strongly 

 marked than those formed by the dissepiments. The latter appear to be quite independent 

 of the adjacent tubes, and are not, in general, placed so as to correspond together horizontally. 



Found at Torquay, Teignmouth Beach, Walcombe Beach, Woolborough Quarry, 

 Babbacombe, Newton, Plymouth, and Mary church ; and also in Germany in the Eifel 

 Mountains, and on the banks of the river Lahn. 



Specimens are in the Museums of the Geological Society of London, of Practical 

 Geology, and in the collections of Messrs, J. S. Bowerbank, Battersby, and Pengelly. 



This coral has often been confounded vrith the Heliolites inlerstinda} but differs 

 from it by the calices being much less^ closely set, and by the Caenenchyma being more 

 developed. In H. Murchisoni^ the calices are also very distant, but in the above- 

 described species the tabulae are less numerous, and the dissepiments of the Caenenchyma 

 are thinner than the vertical laminae of the tubes of the same tissue, and do not cor- 

 respond among themselves so as to constitute horizontal strata. 



We have not adopted the name of Pyriformis, which Blainville, Mr. Lonsdale, and 

 Mr. M'Coy apply to this species, as having been given to it by Guettard ; because the 

 French epithet pyriforme was given by Guettard himself to several other species, but not 

 made use of as a specific name, and because Goldfuss had called it Astrea porosa before 

 Blainville proposed employing the former designation. 



We also see no reason for giving to the genus, to which this specimen belongs, the 

 name of Palceopora in preference to that of Heliolites, the latter having been revived from 

 Guettard's writings in 1846 by Mr. Dana, and the former having been introduced only in 

 1848 by Mr. M'Coy. The name of Geoporites, given more recently to the same group of 

 corals by M. D'Orbigny, must also, in consequence of the law of priority, be rejected. 



2. Genus Battersbyia.^ 



Battersbyia in^qualis. Tab. XLVII, figs. 2, 2a, 2d. 



Batteksbyia iNiEauALis, Milne Edwards and Jules Haime, Monogr. des Pol. Foss. des Terr. 



Palaeoz., p. 227, 1851. 



Corallum composite, massive. Corallites very unequal in size^with thick non-costulate 

 walls, united together by a thin, spongiose, irregular Caenenchyma. Calices almost 

 circular, never subpolygonal. Septa small but well defined, somewhat unequal in size 

 alternately, rather thick towards the wall, but very thin inwardly ; 26 of them in the large 

 calices. Tabula appearing to be vesicular, and filling the visceral chambers. Canenchyma 



' Astrea porosa, Hisinger, Leth. Succ, p. 98, tab. xxviii, fig. 2, 1837. 



2 Milne Edwards and Jules Haime, Pol. Foss. des Terr. Palaeoz., p. 215, 1851. 



3 Milne Edwards and Jules Haime, Polyp. Foss. des Terr. Palaeoz., pp. 151, 227, 1851. 



