PLATE XLII. 



Fig. l. — Sanguinolites anguJatus. A right valve. From the Carboniferous Limestone of Thorpe 

 Cloud. My Collection. (Page 871.) 



Fig. 2. — Sanguinolites angulatus. The left valve of a young specimen. Same locality and Collec- 

 tion. (Page 371.) 



Figs. 3, -4. — Sanguinolites angulatus. Two right valves showing 4 a', the umbones and long 

 escutcheon. Same locality and Collection. (Page 371.) 



Fig. 5. — Sanguinolites V-serijJtus. A specimen from the Eedesdale Ironstone, showing 5 a, 

 the upper border, My Collection. (Page 382.) 



Fig. 6. — Sanguinolites \l-scriptus. A crushed example, showing fig. 6 a, the umbones and 

 escutcheon. From a marine baud below the third Millstone Grit, Congleton Edge. My Collection. 

 (Page 382.) 



Figs. 7, 7rt. — Sanguinolites M'Scriptus, Showing right and left valves, Avith the peculiar markings 

 of the shell. Same locality. My Collection. (Page 382.) 



Fig. 8. — Sanguinolites interrvptus. A specimen from the Carboniferous Limestone of Thorpe 

 Cloud. My Collection. (Page 383.) 



Fig. 9. — Sanguinolites inierrttptus. A right valve. Same locality. In the Collection of Mr. 

 W. F. Holroyd, of Manchester. (Page 383.) 



Fig. 10. — Sanguinolites interruptus. A very well-marhed example of a left valve. Same locality. 

 My Collection. (Page 383.) 



Fig. 11. — Sanguinolites tricostatus. A left valve, with portions of the shell. From Fermanagh. 

 In the Collection of the Geological Survey of Ireland. (Page 391.) 



Fig. 12. — Sanguinolites tricostatus. A specimen showing the posterior adductor muscle scar and 

 the depression above it. From the Eedesdale Ironstone beds. My Collection. (Page 391.) 



Fig. 13. — Sanguinolites tricostatus. A young example. From the marine bed below the Kinder 

 Scout Grits of Horaebridge Clough. In the Collection of Owens College, Manchester Museum. 

 (Page 391.) 



Fig. 14. — Sanguinolites tricostatus. A cast of the interior of the right valve. From Fermanagh. 

 In the Collection of the Geological Survey of Ireland. (Page 391.) 



Fig. 15. — Sanguinolites tricostatus. The right valve of Portlock's type. Preserved in the 

 Museum of the Eoyal School of Mines, Jermyn Street. (Page 391.) 



Fig. 10. — Sanguinolites sfriato-granulosus. A fine specimen. From Hill Stebden, Yorkshire. My 

 Collection. With fig. IG a, a view from above. (Page 393.) 



Fig. 17. — Sanguinolites striato-granulosus. A cast of the interior. From the Carboniferous 

 Limestone of Poolvash, Isle of Man. My Collection. (Page 393.) 



Fig. 18. — Sanguinolites striato-granulosus. A large example. Same locality and Collection. 

 (Page 393.) 



Fig. 19. — Sanguinolites striato-granulosus. A specimen from Malahide, co. Dublin. In the 

 Collection of the Geological Survey of Ireland. (Page 393.) 



Fig. 20. — Sanguinolites striato-granulosus. A fine testiferous example. From the Lower Lime- 

 stone series of Craigenglen. In the Collection of Mr. J. Neilson ; with a magnified view of the 

 surface, fig. 20 a. (Page 393.) 



Fig. 21. — Sanguinolites striato-granulosus. A cast. From the Eedesdale Ironstone beds. My 

 Collection. (Page 393.) 



Fig. 22. — Sanguinolites striato-granulosus. A cast, showing muscle scars and pallial line. From 

 Poolvash, Isle of Man. My Collection. (Page 393.) 



