GENERA OF FAVOSITID^E. 135 



the neighbourhood of its mouth, this portion of the corallite 

 being in reality rather dilated than narrowed. The deposit of 

 secondary sclerenchyma seems, further, to be laid down almost 

 entirely on the upper aspect of each corallite in its interior, so 

 that the visceral chamber is reduced to a mere slit occupying 

 the lower side of the corallite. In the interior portions of the 

 branches the corallites are not thickened, but possess patulous 

 tube-cavities (PI. VI., fig. 5 a), which are intersected by remote 

 and complete tabulae, and are placed in communication by dis- 

 tinct mural pores. Transverse sections (PI. VI., fig. 5 b) not 

 only show the absence of secondary thickening in the walls 

 of the corallites in the interior of the corallum, but likewise 

 the compressed and subpolygonal form of the tubes in this 

 region. 



Formation and Locality. Abundant in the Wenlock Lime- 

 stone of Dormington Quarry, Stoke-Edith. 



Ccenites linearis, Edwards and Haime. 

 (PL VII., figs, i- 1 <?.) 



Ccenites linearis, Milne-Edwards and Haime, Pol. Foss. des Terr. Pal., p. 302, 

 1851 ; and Brit. Foss. Cor., p. 277, PI. LXV., fig. 3, 1854. 



Spec. Char. Corallum usually in the form of a lamellar ex- 

 pansion, sometimes sublobate, rarely massive. Corallites from 

 a fifth to a fourth of a line in diameter, compressed, and pos- 

 sessing thin walls throughout the interior of the corallum. On 

 approaching the surface they bend more or less abruptly out- 

 wards, their upper walls being now greatly thickened by an 

 adventitious deposit of sclerenchyma, and their tube-cavities 

 reduced to a mere fissure. Calices in the form of long linear 

 slits, sometimes nearly straight, sometimes arcuate, which have 

 a length of about half a line, or rather less, with a width of not 

 more than about one-twelfth of a line. Tabulse remote, hori- 

 zontal, complete. Mural pores circular, of tolerably large size, 

 moderately numerous, irregularly distributed. Septa repre- 



