92 BRITISH FOSSIL CORALS. 
the regularity of their structure and the circular form of their calices (figs. 20, 2c). Some 
of them are met with in the Lias, and the same generic form appears to have existed in the 
Triasic period, at St. Cassian ; but those of which the characters are best known all belong 
to the Oolitic formation. C/adophyllia Conybearii resembles very much C. dichotoma,' to 
which Prof. M‘Coy has referred it ; but we think they are not specifically identical, for the 
folds of the epitheca appear to be more developed and more irregular in the Giengen coral 
than in the Steeple-Ashton fossil; but the former has only been found in such a bad state 
of preservation that it is as yet difficult to decide the question. C. Badeana’ differs also 
but little from C. Conybearii, but has the tertiary septa less developed and the folds of the 
epitheca quite horizontal, whereas they are somewhat oblique in the latter species. Eunomia 
rugosa, D’Orbigny,’ which appears to be also very nearly allied to the above -described 
species, but may be distinguished by the great obliquity of the epithecal folds. C/adophyllia 
articulata,* and C. levis? differ from the former by their thick accretion tumefactions; and 
C. funiculus,’ by the surface of its corallites being quite even and presenting no such 
swellings, C. lumbricalis'’ has a much thicker epitheca than C. Conybearii, and its 
calices are much larger. Some other fossils mentioned by different authors under various 
specific names appear to belong to the same group, but have not as yet been satisfactorily 
characterised and it would, therefore, be useless to dwell upon them here.* 
Genus GONIOCORA.® 
Gontocora sociaLis. Tab. XV, figs. 2, 2a, 24. 
LITHODENDRON soctaLn, F. A. Roemer, Versteiner. des Norddeutschen oolithen gebirges 
Suppl., tab. xvii, fig. xxi, 1859.10 
DENDROPHYLLIA PLICATA, M‘Coy, on some new Mesozoic Radiata, in Ann. and Mag. of Nat. 
Hist., s. i, vol. 1i, p. 403, 1848. 
Gontocora soctaLis, Milne Edwards and J. Haime, Polyp. Paleoz., &e., p. 96, 1851. 
Corallum composite, dendroid, and presenting in general one or more principal erect 
stems bearing lateral branches, each of which also gives birth to a series of smaller branches. 
' Lithodendron dichotomum, Goldfuss, Petret., tab. xiii, fig. 3. 
* Eunomia Babeana, D’Orbigny, Prod., vol. i, p. 292. 
3 Prodr., vol. ii, p. 32. 
Lithodendron articulatum, Michelin, Icon., pl. xxi, fig. 1. 
cs 
® Lithodendron leve, Michelin, Icon., pl. xix, fig. 8. 
Lithodendron funiculus, Michelin, Icon., pl. xix, fig. 7. 
7 Calamophyilia lumbricalis, D’Orbigny, Prodr., t. ii, p. 3. 
‘ The list of these fossils is given in the Introduction to our Memoir on Paleozoic Corals, loc. 
a 
cit., p. 82. 
9 Milne Edwards and J. Haime, Polyp. Palzeoz., &., p. 96. 
© But not the figure given under the same name in the first plate of that work (fig. 3), which appears 
to be a Rhabdophyllia, and does not differ from the Lithodendron nanum of the same author. 
