CARBONIFEROUS FOSSILS OF IRELAND. 207 



This coral is very remarkable as being the only species o£ Polj/pora yet known with prominent pores ; they 

 are so prominent in the specimen figured as to resemble the wart-like pores of some of the Gorgonim ; the spaces 

 between them are marked with coarse, waving strife ; the fenestrulcs are very regular, long and narrow. 



Retepora prisca. Gold. (Not Fenestella prisca. Lonsd.) 



Very imperfect specimens, probably referrible to Retepora prisca ofGoldfuss, have occurred; they belong, 

 of course, to the genus Fenestella, but not to the Silurian F. prisca. 



Retepora undata. M'Coy. (PI. XXIX. fig. 11). 



Sp. CA.— Irregularly cup-shaped; interstices anastomosing, flattened; fenestrules ovate, pointed atone 

 end; poriferous face with five or six rows of pores in quincunx; reverse with waved, or scale-like, semicircular 

 ridges. 



This fine species is not uncommon. The specimens figured exhibit the longitudinal central axis ot 



attachment. 



THE END. 



