PLATE LIV. 



Fig. 1. — Conocardium aliforme. The type figured by Sowerby, preserved in 

 the Sowerby Collection, Natural History Museum, South Kensington. (Page 

 460.) 



Fig. 2. — Conocardium aliforme. Another type figured by Sowerby; with 

 Fig. 2 a, a view from above. Same Collection. (Page 460.) 



Fig. 3. — Conocardium aliforme. The type specimen figured by Phillips as 

 Cardium armatum; Fig. 3 a, a view from the posterior end ; and 3 &, a view from 

 above. Preserved in the Gilbertson Collection, Natural History Museum, South 

 Kensington. (Page 460.) 



Fig. 4. — Conocardium aliforme. A specimen with the rostrum preserved, from 

 the Carboniferous Limestone of Park Hill, Derbyshire. In the Collection of the 

 Geological Survey, Jermyn Street. (Page 460.) 



Fig. 5. — Conocardium aliforme. A cast of the interior, from Potmetal 

 Plantation, Bogie, Kirkcaldy. Same Collection. (Page 460.) 



Fig. 6. — Conocardium aliforme. A specimen which has lost the rostrum; with 

 Fig. 6 a, a view from above. From the Carboniferous Limestone of Hill Bolton, 

 Yoi-kshire. My Collection. (Page 460.) 



Fig. 7. — Conocardium aliforme. A rather larger example, from the Carboni- 

 ferous Limestone of Hill Stebden, Yorkshire. My Collection. (Page 460.) 



Fig. 8. — Conocardium aliforme. A few specimens from the Carboniferous 

 Limestone of Settle, in the Woodwardian Museum, Cambridge ; with Fig. 8 a, a 

 view of the posterior end and rostrum, and Fig. 8 &, a view from above. (Page 

 460.) 



Fig. 9. — Conocardium aliforme. A fully grown example. Same locality and 

 Collection. (Page 460.) 



Fig. 10. — Conocardium aliforme. A specimen with occasional deep inter- 

 ruptions in the lines of growth. Same locality and Collection. (Page 460.) 



Fig. IL — Conocardium KonincJci. A specimen from the Carboniferous 

 Limestone of Nanteenan, co. Limerick. In tlie Museum of the Geological 

 Survey, Jermyn Street. (Page 464.) 



Fig. 12. — Conocardium KonincJci. A fine specimen from Nanteenan, co. 

 Limerick. In the Collection of the Geological Survey of Ireland. (Page 464.) 



Fig. 13. — Conocardium KonincJci. A specimen showing the posterior surface 

 and long rostrum. Same locality and Collection. (Page 464.) 



