PLATE IX. 



Carboniferous Trilobitbs and Recent Isopoda. 



Fig. 1. — Griffithides acanthiceps, H. Woodw. Restoration in outline. (P. 32.) 

 See PI. VI, figs. 2, 10, and 11, and PL VII, figs. 2 and 3. 



Fig. 2. — Griffithides globiceps, Phill., sp. Restoration in outline. (P. 29.) 

 See PI. VI, figs. 1, 3, 4, 5, and 6. 



Fig. 3. — Griffithides longispinus, Portl. Glabella and hypostome (h), the former 

 showing the preocular pore (p). Longnor, Derbyshire. See PI. VII, figs. 5 and 

 6. (Pp. 3G, 42.) 



The original specimen in the Museum of Practical Geology. 



Figs. 4 a and b. — Griffithides glaber, H. Woodw. 4 a, nearly entire specimen, 

 enlarged twice nat. size ; 4 b, body segments and tail, enlarged twice nat. size. 

 From Castle Mumbles, Glamorganshire. (P. 40.) 



The original specimens in the Museum of Practical Geology. 



Figs. 5 a and b. — Phillipsia scabra, H. Woodw. 5 a, head-shield or cephalon, 

 enlarged three times nat. size ; 5 b, pygiclium or abdomen, enlarged three times 

 nat. size. From Vallis Vale, Frome, Somerset. (P. 43.) 



The original specimens in the Museum of Practical Geology. 



Figs. 6 a and b. — Griffithides ? Garringtonensis, Bth. MS. Two pygidia, en- 

 larged three times nat. size. 6 a, Longnor, Derbyshire ; 6 b, Narrowdale. (P. 41.) 

 The original specimens in the Museum of Practical Geology. 



Fig. 7. — Phillipsia carinata, Salter, MS. Pygidium, enlarged three times nat. 

 size. From the Carboniferous Limestone, Derbyshire. (P. 44.) 

 The original specimen in the Museum of Practical Geology. 



Fig. 8. — Serolis paradoxa (recent). Enlarged one and a half nat. size. From 

 Sandy Point, Straits of Magellan. Showing the pore (p) near the margin of the 

 first thoracic somite. (See Appendix, p. 76.) 



Fig. 9 a, b, c. — Sphceroma gigas (recent). Twice nat. size. From Kerguelen's 

 Island. 9 b, front view of the head, showing pore (p) ; 9 c, half of same, 

 enlarged four times, to show the pore more distinctly (p). (See Appendix, p. 76 ) 



