NEIGHBOURHOOD OF CORK. 



97 



fear that its true structure has not as yet been suf- 

 ficiently explained. 



Unilocular Univalves. 



5. Euomphalus. — This genus was instituted by 

 Sowerby. It appears to be nearly related to the ge- 

 nus Planorbis, so far as the character depends on the 

 shell. The E. pentangulatus, tab. 45. %. 1, % is 

 not uncommon. 



Two or three specimens of other unilocular uni- 

 valves occurred, but in too imperfect a state to en- 

 able any one to assign them their true genus. 



Bivalves. 



6. Cardium. — One singular species occurs 

 here, nearly resembling the recent C. cardissa. It 

 is figured by Sowerby under the name C. Hiber- 

 nicum. It belongs to the genus Hemicardia of 

 Cuvier. 



7. Terebratula. — The rocks of this district 

 furnish many species of this genus, one of which, 

 T. lateralis, is figured by Sowerby, tab, 83. fig. J, 

 Many of the species have the valves so strangely 

 distorted, in comparison of the recent species, as to 

 lead one at first sight to conclude that they had 

 been bruised in their present repository. 



8. Producttts. This genus was likewise instituted 

 by Sowerby, for the reception of several fossil-shells, 

 formerly considered as anomiae. Some of the species 

 found here approach near to the character of those 

 found in the limestone of the independent coal for- 



VOL. III. Gr 



