90 BRITISH FOSSIL CORALS. 
Calamophyllia Stokesi is found at Steeple-Ashton; specimens may be seen in the 
Collection of the Geological Society and of the Paris Museum; that figured in plate 16 
belongs to our friend Ch. Stokes, Esq. 
The genus Calamophyllia, as defined in the Introduction to this Monograph, contained 
all the fasciculated astreinae with naked, costulated walls; but as it has been already 
mentioned here above, we have of late been induced to subdivide that group, and to reserve 
the name of Calamophyllia for the species which present mural annular laps ; this charac- 
teristic feature coincides with the existence of numerous dissepiments and an irregular 
cylindrical form, whereas in the species which do not present such mural appendages, and 
which constitute our genus Rhabdophyllia, the endothecal structures are quite rudimentary, 
and the columella is much more developed. It is also necessary to remark, that the genus 
Calamophyllia thus rectified, must no longer be distinguished from the genus Lunomia of 
Lamouroux, for having had of late the opportunity of examining some specimens of 
Lunomia radiata, in an excellent state of preservation,' we have been enabled to ascertain 
that the walls of this fossil are not covered with an epitheca, as we formerly supposed. By 
right of priority, Lamouroux’s name of Hvnomia ought, therefore, to be substituted for that 
of Calamophyllia, introduced more recently by Blainville; but the former having been 
previously employed for a genus of Lepidoptera, it seems preferable to abandon it here, and 
to adopt the latter. 
The genus Calamophyllia is composed of three of the species described under that 
name in our Monograph of the Astreidee: C. striata, C. pseudostylina, and C. articu- 
losa ; of Calamophyllia radiata, (or Eunomia radiata, Lamouroux,) the British fossil which 
we have called C. Stokes’, and a few other fossils mentioned by M. D’Orbigny in his 
* Prodrome.’ 
Calamophyllia Stokesi bears great resemblance to C. striata,” and differs from it only 
by the mural laps being more developed and closer set, the sey/a more numerous, and the 
costae broader, and separated by deeper furrows. C. pseudostylina’® and C. articulosa* are 
easily distinguished from C. Sfo/esi by the large size of their corallites and of the mural 
annular laps ; C. radiata, on the contrary, differs from all the preceding species by the 
slender form of the corallites, and is also recognisable by the small number of its sep/a. 
' These corals were kindly communicated to us by M. D’Orbigny, in whose fine Palzeontological col- 
lection we have also been enabled to examine many other interesting fossils. 
’ Blainville, ‘Manuel d’Actinologie,’ p. 346, tab. lii, fig. 4. We have of late been able to obtain a 
complete confirmation of the views we alluded to in a former work, relative to the identity of this species, 
and of the Calamophyllia flabeilum ; the fossils described under the latter name by Blainville, and figured 
by M. Michelin, (Iconogr., tab. xxi, fig. 4,) are specimens of C. striata, the costee of which have been worn 
away accidentally, and, in some specimens, we have seen on the same corallite the two forms which were 
considered as characteristic of the two nominal species. 
’ Lithodendron pseudostylina, Michelin, Icon., pl. xix, fig. 9. 
' Milne Edw. and J. Haime, Ann. Se. Nat., 3d ser., t. xi, fig. 26 0. 
Tabs xxii, fies 1 
