PLATE XXIII. 



Fig. 1. — Cardiomorpha vtntricosa. The type specimen figured by M'Coy, now 

 in the Collection of Mr. Joseph Wright, of Belfast, who obtained it from the 

 Collection of Dr. Haines, of Cork. From the Carboniferous Limestone, co. Cork. 

 (Page 266.) 



Fig. 1 a. — Cardiomorpha ventricosa. The same specimen viewed from in 

 front. 



Fig. 1 b. — Cardiomorpha ventricosa. The same specimen viewed from above. 



Fig. 2. — Cardiomorpha ventricosa. A very young specimen from the Carboni- 

 ferous Limestone of Little Island, co. Cork. Same Collection. (Page 266.) 



Fig. 3. — Cardiomorpha ventricosa. A large example from the Carboniferous 

 Limestone, co. Cork. Same Collection. (Page 266.) 



Fig. 4. — Cardiomorpha ventricosa. A specimen from the Carboniferous Lime- 

 stone of the South of Ireland, which possesses less well-marked concentric 

 grooves than generally obtain. In the Collection of Mr. James Neilson, of 

 Glasgow. (Page 266.) 



Fig. 5. — Cardiomorpha corrugata. The type specimen figured by M'Coy. 

 From the Carboniferous Limestone of Millicent, Clane, co. Cork. In the Griffith 

 Collection of the Museum of Science and Art, Dublin. (Page 271.) 



Fig. 6. — Cardiomorpha corrugata. A full-sized example from the Carboni- 

 ferous Limestone of co. Dublin. In the Collection of the Geological Survey, 

 Jermyn Street. (Page 271.) 



Fig. 7. — Cardiomorpha corrugata. A small example from the Carboniferous 

 Limestone of Thorpe Cloud, Derbyshire ; showing 7 a, a view from above, and 7 h, 

 a view from in front. My Collection. (Page 271.) 



