. A catalogue of the collection of Cambrian and Silurian fossils contained in the Geological Museum of the University of Cambridge. Paleontology; Paleontology. 22 MIDDLE CAMBRIAN. Case and Column of Drawers. Reference to McCoy's Synopsis: and Figures of Genera. Names and References; Observations, &c. Numbers and Localities. Gi Gi G case Gi G case Gi Gi Gi Gh. 10 Gi Trilobites. Synopsis, PI. 1 f, fig. 7, p. 167. PL 1 g, fig. Agnostus Hirundo, Salter MSS. A large species, with lobed tail-axis. Agnostus Morei, Salter (Quart. Journ. Geol. Soc. Vol. xxii. p. 486, woodcut). Phacops Nicholso
. A catalogue of the collection of Cambrian and Silurian fossils contained in the Geological Museum of the University of Cambridge. Paleontology; Paleontology. 22 MIDDLE CAMBRIAN. Case and Column of Drawers. Reference to McCoy's Synopsis: and Figures of Genera. Names and References; Observations, &c. Numbers and Localities. Gi Gi G case Gi G case Gi Gi Gi Gh. 10 Gi Trilobites. Synopsis, PI. 1 f, fig. 7, p. 167. PL 1 g, fig. Agnostus Hirundo, Salter MSS. A large species, with lobed tail-axis. Agnostus Morei, Salter (Quart. Journ. Geol. Soc. Vol. xxii. p. 486, woodcut). Phacops Nicholsoni, id. ib. p. 486. Calymene vexata, Salter (with Asaphus Mena- pice). Undescribed yet. A small species. Calymene is very common in Arenig rocks. Calymene ultima, Salter (C. Ramseies, Hicks). Undescribed. Calymene Tristani, Brongniart (Quart. Journ. Geol. Soc. VoL xx. p. 286), &c. A common French species. Calymene parvifrons, Salter. One of the very earliest species known of this common Cam- brian genus. It has the smallest glabella known in the group. (Mem. Geol. Surv. Vol. III. p. 325. Salter, Mon. Brit. Tril. 1865, pi. 9, figs. 25—28). Dionide atra, Salter (Mem. Geol. Surv. Vol. in. p. 321. pi. 11 A, fig. 9). Allied to Ampyx and Trinucleus, but with no perforated fringe. Trinucleus Gibbsii, Salter (Siluria, 2nd ed. p. 53, Foss. 53. fig. 7). The genus is distin- guished by its perforated fringe round the glabella and cheeks. Ampyx Salteri, Hicks MSS. nudus, Murchison. Much like A. Homalonotus, sp. (27". hisulcatus, Mem. Geol. Surv. Vol. in. p. 328. pi. 11 A, fig. 8). A genus more prevalent in the Upper Cam- brian. Like Calymene it has 13 body seg- ments, and a forked labrum. Homalonotus monstrator, Salter. Undescribed as yet. Homalonotus, like Calymene, ranges into Devonian rocks. a. 298, Upper Arenig rocks, Whitesand Bay, St. David's. (Dr. Hicks.) EUergell, near Milburn. [Prof. Harkness' cabinet.] Whiteside, near Braith- waite, Keswick, do. a. 469, Ramsey Isle, N.
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