90 BRITISH POSSIL CORALS. 



CalamophyUia Stokesi is found at Steeple- Asliton ; specimens may be seen in the 

 Collection of the Geological Society and of the Paris Museum ; that figured in plate 1 6 

 belongs to our friend Ch. Stokes, Esq. 



The genus Calamojjhijllia, as defined in the Introduction to this Monograph, contained 

 all the fasciculated astreinse 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 CalamophyUia 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 Rhahdophyllia, the endothecal structures are quite rudimentary, 

 and the columella is much more developed. It is also necessary to remark, that the genus 

 CalamophyUia thus rectified, must no longer be distinguished from the genus Eunomia of 

 Lamouroux, for having had of late the opportunity of examining some specimens of 

 Eunomia 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 oi Eunomia ought, therefore, to be substituted for that 

 of CalamophyUia, introduced more recently by Blainville ; but the former having been 

 previously employed for a genus of Lepidojitera, it seems preferable to abandon it here, and 

 to adopt the latter. 



The genus CalamophyUia is composed of three of the species described under that 

 name in our Monograph of the Astreidse : C. striata, C pseudostylina, and C articu- 

 losa ; of Calamojihyllia radiata, (or Eunomia radiata, Lamouroux,) the British fossil which 

 we have called C. Stokesi, and a few other fossils mentioned by M. D'Orbigny in his 

 ' Prodrome.' 



Calamop)hyllia Stokesi bears great resemblance to C striata,^ and differs from it only 

 by the mural laps being more developed and closer set, the septa more numerous, and the 

 costse broader, and separated by deeper furrows. C. jjseudosfylina^ and C. articulosa^ are 

 easily distinguished from C. Stokesi by the large size of their corallites and of the mural 

 annular laps ; C. radiata^ on che contrary, differs from all the preceding species by the 

 slender form of the corallites, and is also recognisable by the small number of its septa. 



^ These corals were kindly communicated to us by M. D'Orbigny, in whose fine Pala3ontological col- 

 lection we have also been enabled to examine many other interesting fossils. 



2 Blainville, 'Manuel d'Actinologie,' p. 34G, 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 CalamopJujllia flahellum ; the fossils described under the latter name by Blainville, and figured 

 by M. Michelin, (Iconogr., tab. x.\i, fig. 4,) are specimens of C striata, the costse 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., pi. xix, fig. 9. 



* Milne Edw. and J. Haime, Ann. Sc. Nat., 3d ser., t. xi, fig. 26 b. 



5 Tab. xxii, fig. 1. 



