232 BRITISH FOSSIL CORALS. 



Corallmi composite, astreiform, Calices unequal in size, polygonal, and separated by 

 nearly straight walls. Gemmation calicular as well as lateral. Septa (32 or 40) well 

 developed, somewhat unequal in size ; the smaller ones thin all along, the larger ones thin 

 outwardly, but becoming thicker at about two thirds of their breadth, and again thin 

 towards the centre of the calice, where they are slightly curved, and present a very small 

 paliform lobe. The vesicular dissepiments are mostly small, but are rather unequal in size, 

 and do not extend beyond the middle of the thick part of the principal septa. Great 

 diagonal of the calices usually about 6 lines ; diameter of the circle of paliform lobes about 

 two thirds of a line. 



Found at Babbacombe Beach, Torquay, (Collections of Mr. Bowerbank and Dr. 

 Battersby.) 



This species is intermediate between C. hexagonum^ and C. holoniense^ but approxi- 

 mates most to the latter, from which it differs principally by the thickness of the principal 

 septa at a small distance from the centre of the calice. 



14. Cyathophyllum iEauisEPTATUM. Tab, LII, fig. 1. 



Cyathophyllum .*;quiseptatum, Milne Edwards and Jules Haime, Pol. Foss. des Terr. 



Palseoz., p. 389, 1851. 



CoraUum composite, fasciculate. Corallites distant from each other, multiplying by 

 lateral gemmation, sm-rounded by an epitheca, and appearing subcylindrical. Calices 

 deep, and with a thin edge. Septa (about 36) very narrow upwards, not remarkably thin, 

 and almost equal in size. Diameter of the corallites about 4 lines. 



Found at Ilfracombe in Devonshire. 



In the Collection of the Geological Society. 



This species is remarkable for the equal development of all the septa. 



We are inclined to consider the Strephodes gracilis^ of Prof. M'Coy as belonging to 

 the genus Cyathophyllum, but it may be a species of Ftychophyllum. 



1 Tab. 1, fig. 4. 2 Tab. lii, fig. 1. 



^ Strephodes gracilis, M'Coy, Ann. and Mag. of Nat. Hist., 2d ser., vol. vi, p. 378, 1850 j M'Coy, 

 Brit. Palaeoz. Foss., p. 72, 1851. 



Professor M'Coy describes this fossil in the following terms: — "Corallum simple, very gradually 

 tapering, irregularly twisted, averaging three inches long, and eight lines in adult diameter ; horizontal 

 section, outer wall very thick, solid ; radiating lamellae at the above diameter about 56, very thin, extending 

 in a slightly irregular manner towards a large central space, which the primary ones fill with their irregular 

 complicated extremities ; secondary lamellae as thick as the primary, of irregular lengths, but seldom 

 extending one fourth the distance to the centre ; transverse vesicular plates extremely delicate, rather few, 

 irregular; vertical section showing in the middle a few irregularly flexucus dehcate longitudinal lines (edges 

 of the complicated ends of the vertical radiating lamellae) ; sides occupied by very open vesicular tissue, 

 composed of large, curved, delicate, oblique plates, forming about two rows of great cells on each side ; 

 outer wall very thick, forming a nearly smooth surface ; when decorticated, the lamellar sulci average 5 in 

 2 lines ; terminal cup deep, strongly radiated to the flattened centre. Locality; Newton Bu.shel." 



