PLATE IX. 



Figs. 1 and 2. — Carbonicola aquilina. From the locality of the original 

 specimen, Blue Flats, Coalbrookdale. My Collection. (Page 69.) 



Figs. 3 and 4. — Carbonicola aquilina. From the Brooch Coal, Dudley. Pre- 

 sented to me by Mr. Wm. Madeley. My Collection. (Page 69.) 



Fig. 5. — Carbonicola aquilina. From old workings at Whitley, Northumber- 

 land, the original locality of Professor King's Anthracosia Beaniana, showing the 

 anterior two-thirds of the hinge-plate. My Collection. (Page 69.) 



Figs. 6 and 7. — Carbonicola aquilina. In the Manchester Museum Collection, 

 Owens College. (Page 69.) 



Fig. 8. — Carbonicola aquilina. Showing typical anterior end from the Grains 

 Ironstone, Dudley. Presented to me by Mr. Wm. Madeley. My Collection. 

 (Page 69.) 



Fig. 9. Carbonicola aquilina. A fine interior from the roof of the Bowling 

 Alley Seam. Ivy House Colliery, Hanley. It has evidently been fractured, but 

 repaired during life. My Collection. (Page 69.) 



Figs. 10, 12, and 13. — Carbonicola aquilina. From the Coal-measures, Whitley, 

 showing portions of the hinge-plate. Fig. 12 has the right valve crushed, but the 

 hinge-plate is in shadow at (a). My Collection. (Page 69.) 



Fig. 11. — Carbonicola nucularis. Whitley. Showing hinge-plate. My 

 Collection. (Page 63.) 



Fig. 14. — Carbonicola aquilina. Horizon of the Thick Coal, Tipton, South 

 Staffordshire, showing the hinge-plate of the left valve, owing to the slipping of one 

 valve over the other. Presented to me by Mr. Waring. My Collection. (Page 69.) 



Figs. 15 — 24. — Carbonicola aquilina. Whitley. A series to show the variation 

 in form and in the surface markings from one locality. My Collection. (Page 69.) 



Fig. 25. — Carbonicola, aquilina. From the Brooch Coal, Dudley. My 

 Collection. (Page 69.) 



Figs. 26 — 30. — Carbonicola aquilina. Clough Hall Collieries, North 

 Staffordshire. Pyritised specimens in black shale about the horizon of the 

 Banbury seams. Figs. 29 and 30 show a strongly wrinkled periostracum. My 

 Collection. (Page 69.) 



Figs. 31 — 36. — Carbonicola aquilina. A series from one horizon in the 

 Wigan Coal-field showing the typical form of the TJnio lateralis of Brown. Figs. 

 35 and 36 are much elongated transversely. (Page 69.) 



Fig. 37. — Carbonicola aquilina. From roof of the Hard Mine Coal. 

 Hulme Colliery, Adderley Green. My Collection. (Page 69.) 



