PLATE L. 



Fig. 1. — Solenomya primxva. The cast of the left valve of a very fine specimen, showing 

 adductor muscle-scars (Portlock's uiifigured tj-pe). From Agaloo, co. Tyrone. In the Collection of 

 the Geological Survey, Jermyu Street. (Page 438.) 



Fig. 2. — Solenoini/a primseva. Showing both valves. In the Gilbertson Collection, Natural 

 History Museum, South Kensington. (Page 438.) 



Fig. 3. — Solenomya primeeva. — A right testiferous valve. From the Carboniferous Limestone 

 series, Ardross, Fife. My Collection. (Page 438.) 



Figs. 4, 5. — Solenomya primxva. — A left and right valve respectively, showing adductor muscle- 

 scars. From the Carboniferous Limestone of Lowick, Northumberland. In the Collection of the 

 Woodwardiau Museum, Cambridge. (Page 438.) 



Fig. G. — Solenomya primeeva. The cast of a left valve, the type of M'Coy's Sanguinolites 

 radiatus. From Killymeal, Dungannon, co. Tyrone. In the Griffith Collection, Museum of Science 

 and Art, Dublin. (Page 438.) 



Fig. 7. — Solenomya costellata. The cast of a full-grown example, right valve. From the 

 Carboniferous Limestone series of Yorkshire. My Collection. (Page 442.) 



Fig. 8. — Solenomya costellata. The cast of a young example, left valve. From the Carboniferous 

 Limestone of Lowick. In the Collection of the Woodvvardian Museum, Cambridge. (Page 442.) 



Fig. 9. — Solenomya costellata. A left valve with part of the test preserved. From the Coomb 

 Limestone, Kedesdale. My Collection. (Page 442.) 



Fig. 10. — Solenomya costellata. A cast of the right valve, showing adductor muscle-scars. Same 

 locality and Collection. (Page 442.) 



Fig. 11. — Solenomya excisa. A large example from Northumberland. In the Collection of 

 the York Museum. (Page 441.) 



Fig. 12. — Solenomya excisa. A right valve from the Carboniferous Limestone series of 

 Ardross, Fife. My Collection. (Page 441.) 



Fig. 13. — Solenomya costellata. The type of M'Coy's Sanguinolites costellatus. From Killycloghy, 

 Lisbellaw, co. Tyrone. In the Griffith Collection, Museum of Science and Art, Dublin. (Page 442.) 

 Figs. 14, 15. — Solenomya excisa. Two examples, casts, from Lowick. In the Collection of the 

 Geological Survey, Jermyn Street. (Page 441.) 



Fig. 16. — Solenomya excisa. The cast of a left valve, probably from the same locality. In the 

 Collection of the York Museum. (Page 441.) 



Fig. 17. — Clinopistka abhreviata. The right and left valves, overlapping. From the Four-laws 

 Limestone, the Coomb, Eedesdale. My Collection. Presented to me by Mr. J. Dunn. (Page 446.) 

 Fi". 18. — Clinopistka parvula. An almost perfect example. Same locality and Collection. 

 (Page 448.) 



Fig. 19. — Clinopistha parvula. A left valve, almost all the shell gone. Same locality and 

 Collection. (Page 448.) 



Fig. 20. — Clinopistha parvula. A right valve as a cast, showing the adductor muscle-scars. 

 Same locality and Collection. (Page 448.) 



Fig. 21. — Sanguinolites clavatus. A very fine example of the left valve. From Newton Quarry, 

 Kuockhill, Fife. Calciferous Sandstone Series. My Collection. (Page 385.) 



Fig. 22. — Sanguinolites striatus. A left valve with the test well preserved. Same locality and 

 Collection. (Page 401.) 



