PLATE XL. 



Fig. 1. — SanginnoUtes angustatus. The type of Phillips' Sanginnolaria angitstata. lu the 

 Grilbertson Collection, Natural History Museum, South Kensiugton. (Page 3GG.) 



Fig. 2. — SnnguinoJites angustatus. The type of M'Coy's S. discors. Preserved in the GrifiBth 

 Collection, Museum of Science and Art, Dublin. (Page 366.) 



Fig. 3. — Sanguinolites anyttstatus. A cast of the interior of the right valve. From Poolvash, Isle 

 of Man. My Collection. (Page 366.) 



Fig. 4. — Sanguinolites angustatus. A specimen from the Carboniferous Limestone of Thorpe 

 Cloud, Derbyshire. My Collection. (Page 366.) 



Fig. 5. — Sanguinolites angustatus. A fine testiferous example. From the Carboniferous Limestone 

 of Castleton, Derbyshire. My Collection. (Page 366.) 



Fig. 6. — Sanguinolites angustatus. A left valve. From the Lower Limestone series o£ Kerrsland 

 Glen, Ayrshire. In the Collection of Mr. E. Craig. (Page 366.) 



Fig. 7. — Sanguinolites cJavatns. The type of E. Etheridge's Leptodomus clavatus. From Wood- 

 hall, Water of Leith. In the Collection of the Geological Survey of Scotland. (Page 385.) 



Figs. 8, 9, 10. — Sanguinolites clavatus. A series of specimens. From the Calciferous Sandstone 

 scries, West of Pittenweem, Fife. Figs. 8 and 10 somewhat incomplete, Fig. 10 a showing the 

 lunule and escutcheon. My Collection. (Page 385.) 



Fig. 11. — Sanguinolites clavatus. A full-grown right valve. Same locality. My Collection. 

 (Page 385.) 



Figs. 12, 13. — Sanguinolites clavatus. Two specimens. From the Eedesdale Ironstone beds, 

 Northumberland. My Collection. (Page 385.) 



Fig. 14. — Sanguinolites clavatus. A left valve from the Calciferous Sandstone series of Wood- 

 hall, Water of Leith. My Collection. (Page 385.) 



Fig. 15. — Sanguinolites argutus. The type specimen of Phillips's Sanguinolaria arguta. In the 

 Gilbertson Collection, Natural History Museum, South Kensington. (Page 368.) 



Fig. 16. — Sanguinolites argutus. The posterior two thirds of the left valve. From the Car- 

 boniferous Limestone of Thorpe Cloud, Derbyshire. My Collection. (Page 368.) 



Fig. 17. — Sanguinolites Omalianus. A somewhat crushed example. From the Lower Limestone 

 series of High Blantyre. In the Collection of Mr. J. Neilson. (Page 372.) 



Figs. 18, 19, 20. — Sanguinolites Omalianus. Three specimens. From the Carboniferous Lime- 

 stone of Thorpe Cloud, Derbyshire. To show different stages of growth. My Collection. (Page 

 372.) 



Fig. 21. — Sanguinolites Omalianus. A full-grown example. From the Carboniferous Limestone 

 of Tomdeely, co. Limerick. In the Collection of the Geological Survey of Ireland. (Page 372.) 



Fig. 22. — Sanguinolites Omalianus. A right valve, partly testiferous. Same locality and Collec- 

 tion. (Page 372.) 



Fig. 23. — Sanguinolites Omalianus. Probably the type figured by Baily as Myacites Omalianus. 

 From Lisbane, co. Limerick. Same Collection. (Page 372.) 



Fig. 24. — Sanguinolites Omalianus. A specimen from High Blantyre, shewing Fig. 24 «, the 

 escutcheon and lunule. In the Collection of Mr. J. Neilson. (Page 372.) 



