. A catalogue of the collection of Cambrian and Silurian fossils contained in the Geological Museum of the University of Cambridge. Paleontology; Paleontology. 138 SILURIAN. Case and Column of Drawers Gd3 FC Reference to McCoy's Synopsis: and Figures of Genera. FC Gd2 Gd2 Gd3 FC Gd2 Gd3 Spirifera subspuria, p. 195. Gd3 G d 3 Spirifera cyrtwna, p. 193. Gd2 p. 193. Spirifera trapezoidalis, p. 196 (Cyrtia). Names and References; Observations, &c. Spirifer elevatus, Dalm. (Davidson, Sil. Brach. p. 95, t. 10, figs. 7—11, S. octoplicatus, Sil. Syst. pi. 12, fig. 7, but S. elevatus, Salter
. A catalogue of the collection of Cambrian and Silurian fossils contained in the Geological Museum of the University of Cambridge. Paleontology; Paleontology. 138 SILURIAN. Case and Column of Drawers Gd3 FC Reference to McCoy's Synopsis: and Figures of Genera. FC Gd2 Gd2 Gd3 FC Gd2 Gd3 Spirifera subspuria, p. 195. Gd3 G d 3 Spirifera cyrtwna, p. 193. Gd2 p. 193. Spirifera trapezoidalis, p. 196 (Cyrtia). Names and References; Observations, &c. Spirifer elevatus, Dalm. (Davidson, Sil. Brach. p. 95, t. 10, figs. 7—11, S. octoplicatus, Sil. Syst. pi. 12, fig. 7, but S. elevatus, Salter in Mem. Geol. Surv. Vol. in. p. 278). Spirifer plicatellus, Linn. sp. (Anomia, Linn. See Davidson's learned discussion, Sil. Brach. p. 84, t. 9, figs. 9—12). Spirifer plicatellus, var. radiatus, Sow. (David- son, Sil. Brach. p. 87, pi. 9, figs. 1—6). Spirifer radiatus, Sow. Sil. Syst. pi. 12, fig. 6. Spirifer plicatellus, var. radiatus, Salter, Mem. Geol. Surv. Vol. II. pt. 1, p. 382, Siluria, 2nd ed. pi. 21, fig. 2. Spirifer plicatellus, var. globosus, Salter (Mem. Geol. Surv. Vol. II. pt. 1, p. 382. Davidson, pi. 9, figs. 7, 8). Spirifer plicatellus, var. interlineatus, Sow. (Davidson, 1. c. p. 84, pi. 9, figs. 9—12, Siluria, 2nd ed. pi. 21, fig. 1). Spirifer crispus, His. not Linn. (Davidson, 1. c. pi. 10, figs. 13—15). Differs from S. elevatus chiefly in the fewer ribs and these being more deeply striate concentrically. The original figure of Linnaeus evidently represents S. sidcatus, His. Leth. Suec. p. 73. Spirifer, var. with faint ribs. Spirifer exporrectus, Wahl. sp. (S. trapezoi- dalis, Dalman, Siluria, 2nd ed. pi. 21, fig. 3. Cyrtia exporrecta, Davidson, 1. c. t. 9, figs. 13—24). Remarkable, even among Spirifers, for the extreme elevation of the beak. Numbers and Localities. a. 789, interior dorsal v.; a. 790, interior ventral v.; a. 721, Dudley, F. C. b. 739, Keeper's Lodge, Golden Grove; a. 725, young; a. 726, full grown; Dudley, F. C. a. 791 to a.
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