26 PERMIAN FOSSILS. 



generally encircled with eight broad, pectinated, prehensile tentacles ; and the digestive 

 cavity is often lined with a corresponding number of vertical membranous plaits, 

 subserving the same purpose as their more numerous homologues in the Actinarias. 



The only Permian Corals having any claim to be placed in this group;, are those 

 included in the four genera next to be described. 



Genus Calamopora, Goldfuss. 



Diagnosis. — " Stirps calcarea, e tubis prismaticis, parallelus, contiguis, diver- 

 gentibus ; tubi diaphragmatibus transversis (e siphone prolifero) intersepti, et poris 

 lateralibus communicantes.'^^ (Goldfuss.) 



This genus, of which the type is the Calamopora alveolaris, Goldf., was formed for 

 certain species of Corals, including the Corallium Gotldandicuin,\AVi.., erroneously placed 

 by Lamarck in his genus Favosites, which is typified by the Madrepora tiuncata of 

 Esper. The tubes of all the species have their walls foraminated, and they are furnished 

 interiorly with a number of transverse plates situated generally at regular distances 

 from each other. 



Calamoporas existed very abundantly as individuals, though not as species, during 

 the earliest organic periods ; but they do not appear to have lived subsequently to the 

 Permian epoch, 



Calamopora Mackrothti, Geinitz. Plate III, figs. 3, 4, 5, and 6. 



(?) Calamopora spongites, Goldfuss. Petrefacta, p. 82, 1828. 



(?) — — ,, Germ. Transl. De la Beche, Geol. Man. p. 459, 



1832; and 3d Eng. Ed. p. 572, 1833. 

 (?) — — „ Phillips, Enc. Met. vol. vi, p. 615, 1834. 



(?) TuBULicLADiA spiNiGERA, Lonsdale. De Verneuil, Bull. Soc. Geol. France, 2™ serie, 



vol. i, p. 23, 1844. 

 (?) — — „ Geol. Russ. vol. i, p. 221, 1845. 



(?) Stenopora — „ Op. cit. vol. i. Appendix A, p. 632, pi. A, fig. 11, 



1845. 

 Calamopora Mackrothti, Geinitz. Grundriss, p. 582, 1846. 

 Stenopora independens, King. Catalogue, p. 6, 1848. 



— crassa, Lonsdale. Howse, T. N. F. C, vol. i, p. 260, 1848. 



— Mackrothii, Geinitz. Versteinerungen, p. 17, pi. viii, fig. 10, 1848. 

 CosciKiUM DUBiUM, Geinitz. Op. cit. p. 18, pi. vii, figs. 24-27, 1848. 



Diagnosis. — A branching Calamopora : with numerous slender, round or polygonal, 

 transversely-wrinkled tubes, rising perpendicularly in the centre of the branches, and 

 afterwards suddenly curving out to the surface. Interpolated or new tubes numerous ; 

 originating on the outside of the old ones. Margin of the apertures with from five to 

 eight spine-like tubercles. 



^ Petrefacta Germanise, vol. i, p. 77. 



