. A catalogue of the collection of Cambrian and Silurian fossils contained in the Geological Museum of the University of Cambridge. Paleontology; Paleontology. 160 SILURIAN. Case and Column of Drawers. Reference to McCoy's Synopsis: and Figures of Genera. Names and References; Observations, &c. Numbers and Localities. FC FC FC FC GdlO Gd8 GdlO FC Gb FC Gd8 GdlO p. 322. Poterioceras, p. 321. P. ellipticum, p. Hortolus, p. 324. Phragmoceras ventricosum, Sow. (Siluria, 2nd ed. pi. 32). Phragmoceras ventricosum, var. dwarf with close septa. A little like P. arcuatum, Sow. Phragmoceras (G
. A catalogue of the collection of Cambrian and Silurian fossils contained in the Geological Museum of the University of Cambridge. Paleontology; Paleontology. 160 SILURIAN. Case and Column of Drawers. Reference to McCoy's Synopsis: and Figures of Genera. Names and References; Observations, &c. Numbers and Localities. FC FC FC FC GdlO Gd8 GdlO FC Gb FC Gd8 GdlO p. 322. Poterioceras, p. 321. P. ellipticum, p. Hortolus, p. 324. Phragmoceras ventricosum, Sow. (Siluria, 2nd ed. pi. 32). Phragmoceras ventricosum, var. dwarf with close septa. A little like P. arcuatum, Sow. Phragmoceras (Gomphoceras) pyriforme, Sow. (Siluria, 2nd ed. pi. 30, figs. 1—3). Phragmoceras (Gomphoceras) sequale, Salter. Lituites, Breyn. [The genus Lituites differs from Trochoceras in being discoid and not spiral, and from Hortolus by the whorls of the spire being in contact.] Cyrtoceras Biddulphii, Sow. (Lituites, Siluria, 2nd ed. pi. 31, figs. 1, 2). [Cyrtoceras? compressum, Sow. (Phragmo- ceras, Siluria, 2nd ed. pi. 31, fig. 4.)] Cyrtoceras cornicvdum, Barrande (Sil. Syst. Bohem. Vol. II. p. 492, pi. 121); perhaps a Phragmoceras, section round. Trochoceras (Barr.), formerly known as Lituites, but found to be spiral, not discoid shells. Trochoceras spurium, Salter, n. sp. Much narrower whorls than Phragm. nautileum. Trochoceras, sp. Narrow whorls, very faint ribs. Trochoceras giganteum, Sow. (Lituites, Siluria, 2nd ed. pi. 36, figs. 1—3). Very common, but seldom perfect. The species vary as Ammonites and Nautili do, and Trochoceras represents, among the Nautilidse, Helicoce- ras, D'Orb., among the Ainmonitidae. a. 616, Dudley, a. 617, Dudley, F. C. a. 622, Dudley, F. C. a. 623, Dudley, F. C.; b. 835, Tortworth (Earl Ducie); b. 834, Dudley, F. C. Halfway House, on the road from Llandovery to Trecastle. a. 637, Dudley, F. C. a. 914, Dudley. a. 466, Wenlock Shale of Builth Bridge. a. 913, Dudley, F. C. a. 952, Ledbury; a. 641, a. 642, Dudley, F. Please note that these images
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