PLATE VII. 



Carboniferous Trilobites. 



Fig. 1. — Phillvpsia quadrilimba, Phil.,sp. Pygidium. (Figure reproduced from 

 Phillips' ' Geology of Yorkshire,' 1836, vol. ii, pi. xxii, fig. 2, p. 239.) Bolland, 

 Yorkshire. (P. 26.) 



Fig. 2. — Griffithides acanthiceps, H. Woodw. Nearly complete example, from 

 Craco, near Grassington, Yorkshire. (P. 32.) 



The original specimen in the cabinet of J. Aitken, Esq., Sandfield, Urmston, 

 Manchester. 



Fig. 3. — Griffithides acanthiceps. — Showing a detached head and pygidium 

 from Settle, Yorkshire. (P. 33.) 



The original specimen in the Woodwardian Museum, Cambridge. 



Fig. 4. — Phillipsia laticaudata, H. Woodw. A detached glabella and pygidium 

 from Bolland, Yorkshire. (P. 42.) 



The original specimen in the Geological Department, British Museum (Natural 

 History.) 



Figs. 5 a, b, c, and 6. — Griffithides longispinus, Portl. — 5 a, profile ; 5 6, front 

 view of head; 5 c, view of pygidium of a rolled-up example (being the type- 

 specimen figured by Portlock in his ' Geology of Londonderry and Tyrone,' pi. 

 xxiv, fig. 12) ; 6, restoration of same unrolled. From Carnteel, Tyrone, Ireland. 

 (P. 36.) 



The original specimen in the Museum Practical Geology, Jermyn Street. 



Figs 7 and 8. — Griffiihides brevispinus, H. Woodw. Portions of two heads. 

 From Langside, Beith, Ayrshire. (P. 39.) 



Original specimens in the collection of Mr. Robert Craig, Langside, Beith. 



Figs. 9, 10, 11, and 12. — Griffithides moriceps, H. Woodw. The heads only 

 preserved. From Settle, Yorkshire. (P. 39.) 



Original specimens in the Woodwardian Museum, Cambridge. 



Fig. 13. — Griffithides calcaratus, M'Coy. Copied from Prof. M'Coy's figure in 

 ' Synopsis Carbonif. Fossils of Ireland,' 1844, pi. iv, fig. 3. Roughan, Dungannon, 

 Ireland. (P. 38.) • 



