PLATE XLIX. 



Fig. 1. — Allorisma Ansticei. An almost complete specimen, showing the 

 tubercles on the external surface, with 1 a, a magnified view of the surface. From 

 the Lower Limestone Series of Auchenmade, Ayrshire. In the Collection of 

 Mr. J. Smith. (Page 428.) 



Fig. 2. — Allorisma Ansticei. The type of Sowerby's species. From the 

 Pennystone Ironstone, Coalbrookdale. In the Prestwich Collection at the Natural 

 History Museum, South Kensington. Fig. 2 a, the same shell viewed from below. 

 (Page 428.) 



Fig. 3. — Allorisma Ansticei. A full-grown shell. Same locality. My Collec- 

 tion. Fig. 3 a, the same specimen viewed from above. (Page 428.) 



Fig. 4. — Tellinomorpha jucimda. A left valve from the Carboniferous Lime- 

 stone of Peirk Hill. In the Collection of the Geological Survey, Jermyn Street. 

 (Page 432.) 



Fig. 5. — Tellinomorpha ciineiformis. An almost perfectly preserved specimen 

 from the Lower Limestone Series of Auchenskeith ; with 5 a, a view from above. 

 In the Collection of Mr. J. Smith. (Page 433.) 



Fig. 6. — Tellinomorpha cuneiformis. A very fine example, showing the 

 radiating rows of tubercles on the surface ; with 6 a, a portion of the surface 

 magnified. From the LoAver Limestone Series of Hind og glen. Same Collection. 

 (Page 433.) 



Fig. 7. — Tellinomorpha cuneiformis. The greater part of the right valve of a 

 full-grown shell. From the Carboniferous Limestone of Castleton, Derbyshire. 

 My Collection. (Page 433.) 



Fig. 8. — Telli7iomorpha cuneiformis. The anterior portion of a left valve. Same 

 locality and Collection. (Page 433.) 



Fig. 9. — Tellinomorpha cuneiformis. A small example from the Carboniferous 

 Limestone of Park Hill, Derbyshire. My Collection. (Page 433.) 



Fig. 10. — Sanguinolites interruptus. A large full-grown example from the 

 Carboniferous Limestone of Castleton, showing the left valve. Fig. 10 a, the right 

 valve of the same shell. My Collection. (Page 383.) 



