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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1875 Excerpt: ...Fig. 8 a, 6. Beixerophon Arfonensis, Salter. Memoirs Geological Survey, vol. iii., p. 349, pl. x., figs. 6, 7. a. From Memoirs Geological Survey, pl. x., fig. 6. View showing in-flated mouth: the form is, however, much altered by pressure, ft From the same plate, fig. 7. Back view. Upper Tremadoc.--Moel-y-gest, Garth, Penrhyn, Penclogwyn, Tu-hwntyr-bwlch, Portmadoc. Passage beds, Llanerch. PTEROPODA. Fig. 9 a, b. Theca Opeecdlata, Salter. Memoirs Geological Survey, vol. iii., p. 351, pl. x., figs. 22-24. a. From pl. x., fig. 22. View of flattened or dorsal side, showing opercu-lum. 6. From fig. 22. With point restored. Lower Tremadoc Abundant in all the localities near Portmadoc, Borthwood, Tyn-y-dre, Tyn-y-llan, North Wales. Fig. 10.--Conularia Homfrayi, Salter. Memoirs Geological Survey, vol. iii., p. 354, pl. x., figs. 11-13. From Memoirs Geological Survey, pl. x., fig. 12. This large Pteropod shell is stated by Mr. Salter to occur four inches and a half long, and three quarters of an inch wide at the larger end, from which it gradually tapers to the point or apex; the surface being ornamented with double ridges, eight in number. Upper Tremadoc.--Garth Hill, abundant; Tuhwnt-yr-bwlch, Portmadoc, North Wales. PLATE VI. FOSSILS OF THE LLANDEILO ROCKS. PLANTS?--ALGJE. Fig. 1--Paleochorda Ma Job, M'Coy. From the original figure in Brit. Pal.JFoss., pl. i. A., fig. 3 (reduced to half natural size). Llandeilo.--Skiddaw slate, Kirkfell, near Scawgill, Cumberland. ZOOPHTTA. Fig. 2--a, b. Nebulipora Favulosa, Phillips, sp. Nebuliporafavulosa.--Memoirs Geological Survey, vol. ii., 'pl. i., pl. xxx., figs. 3,3a; vol. iii., p. 282, pl. xix., fig. 10 and a. (the same figures having been transferred). Nebulipora lens, M'Coy Brit. Pal. Foss., pl. i. C, fig. 7. a. Natural...
