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EXPLANATION OF THE PI.ATES. 
PLATE XLII. 
FOSSILS OF THE PERMIAN ROCKS. 
MULLUSCA.—POLYZOA. 
Fie. 1.—a, b, ec. Synocnapra virevtacna, Phillips, sp. 
Retepora, Phillips, Trans. Geol. Soc. of London, 2nd ser., vol. iii., p. 120, 
pl. xi., fig. 6. Fenestella, Phillips, Bull. Soc. Géol., France, 2me. ser., 
vol. i., p.25. Synocladia, King, Mon. Permian Fossils, Pal. Soc., 1850, 
p. 39, pl. ii., fig. 14; pl. iv., figs. 1—8. 
Original. a. Side view of a small hemispherical example, Dalton le Dale. 
Mus. G.S. I. 0. Celluliferous surface, enlarged. c. Non-celluliferous 
surface, do. Mus. G. S. I. 
PERMIAN, MaGNeEsIAN LimestonE.—Humbleton, Dalton le Dale, Whitley 
and Durham. 
BRACHIOPODA. 
Fic, 2.—CaMararnoria cruMENA, Martin, sp. 
Anomites, Martin, Pet. Derb., pl. xxxvi., fig. 4. Terebratula, Sow. Min. 
Conch., pl. Ixxxiil., fig. 3. Camaraphoria Schlotheimi, King, Mon, 
Perm. Foss., p. 118, pl. vii., figs. 1O—21; pl. viii., fig. 8. 
Original. Dorsal view, ‘Lunstall. Mus. G. S. I. 
CARBONIFEROUS LIMESTONE AND PERMIAN.—Carb. Limest., Derbyshire 
Dove Dale; Settle, Yorkshire; West Lothian, Scotland. Permian, 
Humbleton, Tunstall, Tynemouth, and Durham. 
Fie, 3.—a, 6. CamarapHorta Humsrietonensis, Howse, sp. 
Terebratula Humbletonensis, House, Cat. Perm, Foss., Trans. T. N. F.C., 
vol. i., part iii, p. 252. Camaraphoria multiplicata, King, Ann, and 
Mag. Nat. Hist., vol. xviii., 1st series, p. 28. C. Humbletonensis, Dav. 
Brit. Perm. Brach., Pal. Soc., 1857, p. 28. 
Original. Internal casts. a. Dorsal valve. 6. Ventral valve, Humbleton. 
Mins. (G. Soo. 
PERMIAN.—Humbleton quarry, and Dalton le Dale. 
