EXPLANATION OF THE PLATES. il 
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Fra. 4.—STRoPHALOSIA LAMELLOSA, Geinitz, sp. 
Orthotriz lamellosus, Geinitz., Verstein, p. 14, pl. v., figs. 16—26, 1848. 
Strophalosia Morristana, King, Cat. Perm. Foss., 1848, and Mon. of English 
Perm. Foss., Pal. Soc., 1850, p. 99, pl. xii., figs. 18—25, and 27—32, 
S. lamellosa, Davidson, Brit. Perm, Foss., 1857, p. 44, pl. iii., figs, 
24—41. 
Original, View of ventral valve, Ryhope. Mus. G. S. I. 
Prrm1ay.—Tunstall, Tynemouth, Humbleton, and Ryhope, 
Fic. 5.—a, 6. Propuctus norripvs, Sowerby. 
Min. Conch., vol. iv., p. 17, pl. cecxix., fig. 1. Brit. Perm. Foss., Pal. Soe., 
1857, p. 33, pl. iv., figs. 13—26. 
a. From Brit. Perm. Fossils, pl. iv., fig. 16. 6. Original. Internal cast of 
the dorsal valve, showing the muscular impression. Tunstall Hill. 
Mus. G.S. I. 
Permtan.—lIt abounds in the shell limestones of Humbleton and Tunstall 
liils ; in the compact Limestone of Midderidge, as well as in the Breccia 
of Tynemouth Cliff. It is also mentioned, from Derbyshire, Brit. Perm, 
Fossils, p. 36. 
CONCHIFERA. 
Fie. 6.—Monorts spetuncarra, Schlotheim, sp. 
Gryphites speluncarius, Schl. Akad, Miinch., p. 30, pl. v., fig. 1, a, b, ¢ 
1816. Avicula grypheoides, Sowerby, Trans. Geol. Soc. London, 2nd 
series, vol. iii., p. 119. A. spelunearia, Morris, Cat. Brit. Foss. (1854), 
p. 162. Monotis, King. Permian Fossils, p. 155. 
From Permian Fossils, pl. xui., fig. 7. Humbleton Hill. 
Prrmran.—Humbleton and Tunstall Hills, &e., ‘‘a common fossil both in 
England and Germany,” King. Perm. Foss., p. 156. 
Fie. 7.—BaAkeweE.ia antigua, Iiinster, sp. 
Avicula, Minster, Goldf. Pet., part ii., p. 126, pl. exvi., fig. 7, a, D. 
Bakewellia, King. Permian Fossils, p. 168. 
Original. Tunstall. Mus. G.S. I. 
PrRMIAN.—Several localities in Durham, Yorkshire; Newtown, near Man- 
chester; Kirkby Woodhouse, Nottinghamshire; near Dungannon, Co. 
Tyrone; a widely distributed species, appearing to be characteristic of 
every member of the Permian system. 
Fic. 8.—AxInus TRUNCATUS, King, sp. 
Schizodus, King, Perm. Foss., p. 193, pl. xv., figs. 25—29. 
Original. Tullyconnel, Co. Tyrone. Mus. G. 8. I. | 
PERMIAN.—Humbleton, Tunstall, Silksworth, and Whitley, in shell lime- 
stone. Tullyconnel, Tyrone. 
