﻿PLATE XXII. 



1. Rhynchonella pugnus, Martin,^. From the original specimen, now in the collection 



of Mr. J. de C. Sowerby. Carboniferous limestone of 

 Castleton. 



2. — — From near Bolland. This is the average size of specimens. 



3. 4. — — ■ Two enormously large examples from Linton, in the Craven 



district, Gilbertsonian Collection, British Museum. One 

 figure of each of these specimens was given in the 'Geology 

 of Yorkshire they are the largest examples of the species 

 hitherto discovered. 



5, 6. — — Two large specimens from Linton, in the collection of Mr. 



J. de C. Sowerby. 



7, 8. — — • Front view of two Yorkshire specimens in the British 



Museum. 



9 — 12. — — From Clitheroe ; young shells. 



13 — — Interior of the dorsal valve. 



14. — — From Carluke parish, Lanarkshire. 



15- — — Ter. sulcirostris, Phillips. After the figure in the ' Geology 



of Yorkshire/ 



16. — — Atrypa laticliva, M'Coy. From the figure in the 



' Synopsis.' 



