PLATE XLVII. 



Fig. 1. — Sanguinolites siibcarlnatus. A left valve (M' Coy's type). From the 

 Carboniferous Limestone of Lowick. In the Collection of the Woodwardian 

 Museum, Cambridge. (Page 409.) 



Fig. 2. — Sanguinolites subcarinatus. A specimen, left valve. From the Car- 

 boniferous Limestone of Poolvash, Isle of Man. My Collection. (Page 409.) 



Fig. 3. — Sanguinolites suhcarinatus. A full-grown left valve. From the 

 Carboniferous Limestone of Castleton, Derbyshire. My Collection. (Page 409.) 



Fig. 3 a. — Sanguinolites suhcarinatus. The same specimen viewed from 

 above. 



Fig. 4. — Sanguinolites suhcarinatus. A right valve. From Poolvash, Isle of 

 Man. My Collection. (Page 409.) 



Fig. 5. — AUorisma maxima. The type of Portlock's Sanguinolaria maxima. 

 From Donaghenry, co. Tyrone. In the Collection of the Geological Survey, 

 Jermyn Street. (Page 419.) 



Fig. 6. — AUorisma maxima. An almost perfect specimen, showing the sinuated 

 pallial line and muscle-scars. From the Carboniferous Limestone near Llangollen, 

 North Wales. (Page 419.) 



Fig. 7. — AUorisma maxima. A very fine example of a cast of the interior. 

 From the same locality, in the possession of Mr. J. G. Goodchild, F.G.S. 

 (Page 419.) 



Fig. 7 a. — AUorisma maxima. The same specimen viewed from above. (Page 

 419.) 



