PLATE XXIV. 



Fig. 1. — Cardiomorpha Egertoni, A very transverse example from the Carbo- 

 niferous Limestone of Ireland. In the Collection of the Geological Survey of 

 Ireland. (Page 274.) 



Fig. 2. — Cardiomorpha Egertoni. The left valve of the type specimen of 

 M'Coy's Mactra incrassata from the Carboniferous Limestone of Kilmallock. 

 The artist has unfortunately depicted the opposite valve to that which is shown 

 by M'Coy, although, from M'Coy's custom of not reversing his figures on the stone, 

 it would appear that the left valve is figured in each case. In the Griffith Collec- 

 tion of the Museum of Science and Art, Dublin. (Page 274.) 



Fig. 3. — Cardiomorpha obliqua. A very finely preserved example from the 

 Carboniferous Limestone of Ardlamon, co. Limerick. In the Collection of the 

 Geological Survey of Ireland. (Page 263.) 



Fig. 4. — Cardiomorpha obliqua. A very large example of the right valve, 

 showing the comparative elongation of the anterior end in advanced growth. 

 Same locality and Collection. (Page 263.) 



Fig. 5. — Cardiomorpha obliqua. A fine specimen from the Carboniferous 

 Limestone of the Isle of Man. In the Collection of the Woodwardian Museum, 

 Cambridge. (Page 263.) 



Fig. 5 a. — Cardiomorpha obliqua. The same specimen viewed from above. 



Fig. 5 b. — Cardiomorpha obliqua. The same specimen viewed from in front. 



