242 



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C/wttetes Hardrensis, Phillips. Fig. and Des. of the Pal. Foss. of Cornwall, p. 138, pi. xl, fig. 104. 



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— polita, M'Coy. Brit. Pal. Foss., p. 456, pi. m°, fig. 30. Dav. Mon., p. 190, pi. xlvii, 



























N.B. Several very doubtful species of Chonetes are not here tabulated (see p. 188). 





























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? — Ryckholtiana, De Kon. Anim. Foss. Belgique, pi. xxiii, fig. 5. Dav. Mon., p. 1 95, pi. xlviii, 





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Discina nitida, Phillips. Qeol. York., vol. ii, p. 221, pi. ix, figs. 10 — 13. Dav. Mon., p. 197, pi. xlviii, 

 figs. 18 — 25 = B. cincta, Portlock=D. bulla, N l Coj=D.Koiiiiickii, Geinitz 



? — Davreuxiuna, De Kon. Anim. Foss. Belg., p. 306, pi. xxi, fig. 4, Dav. Mon., p. 198, pi. xlviii, 



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Lingula squamiformis, Phillips. Geol. York., vol. ii, pi. ix, fig. 14. Dav. Mon., p. 205, pi. xlix, figs. 1 — 10 



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( — mytiloides, Sow. Min. Con., tab. xix, figs. 1, 2. Dav. Mon., p. 207, pi. xlviii, figs. 29 — 36 = 



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(.?— Credneri. Gunij Verst. der Zech., pi. iv, figs. 23— 29. Dav. Mon., p. 209, pi. xlviii, figs. 38 — 40 



N.B. This is probably a synonym of L. mytiloidea. 

 1 lalior, M'Coy. Br. Pal. Foss., pi. iii°, fig. 23. Dav. Mon., p. 210, pi. xlviii, fig. 37 







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