. A catalogue of the collection of Cambrian and Silurian fossils contained in the Geological Museum of the University of Cambridge. Paleontology; Paleontology. PL 1e, f. 18 a, p. Names and References; Observations, &c. Barrandia (Ogygia) radians. McCoy (Salter, Mon. Brit. Tril. 18C6, pi. 19, figs. 1—4). A genus distinguished from Ogygia by the length of the glabella, and its shape. Barrandia Cordai, McCoy (Salter, Mon. Brit. Tril. 1866, pi. 19, fig. 5). Short, oval, smooth. Asaphus ? sp. with a short tail-piece. [Lichas patriarchus, Edgell, Geol. Mag. 1866, p. 162. The earliest speci
. A catalogue of the collection of Cambrian and Silurian fossils contained in the Geological Museum of the University of Cambridge. Paleontology; Paleontology. PL 1e, f. 18 a, p. Names and References; Observations, &c. Barrandia (Ogygia) radians. McCoy (Salter, Mon. Brit. Tril. 18C6, pi. 19, figs. 1—4). A genus distinguished from Ogygia by the length of the glabella, and its shape. Barrandia Cordai, McCoy (Salter, Mon. Brit. Tril. 1866, pi. 19, fig. 5). Short, oval, smooth. Asaphus ? sp. with a short tail-piece. [Lichas patriarchus, Edgell, Geol. Mag. 1866, p. 162. The earliest species of this genus known in Britain. See Middle Bala for genus.] Cheirurus (Eccoptochile) Sedgwickii, McCoy. A remarkable, large, trilobite, more expanded than any other of the British forms; they are mostly very convex. A kindred species occurs in Bohemia. Calymene Cambrensis, Salter (Mon. Brit. Tril. pi. 9, figs. 12—14). This has been included under G. Baylei, Barrande, and also C. bre- vicapitata Portl. by McCoy; but the last is a Middle Bala species, and no Bohemian forms are identical with ours. Homalonotus bisulcatus, Salter (Mon. Brit. Tril. 1865, pi. 10, figs. 3—10). Homalonotus was a long-lived genus, and of all the more per- fect trilobites the least trilobed. Asaphus (Isotelus) laticostatus, McCoy, not of Green. The Asaphus laticostatus of Green is a Phacops. (See Salter, Mon. Brit. Tril. 1866, p. 158, pi. 18, fig. 6.) Asaphus tyrannus, Murch. (Salter, Mon. Brit. Tril. pi. 21, 22.) One of the largest of all known trilobites: sometimes a foot or more in length. Mr. Hughes' specimen (981) must have been rather more. It is as character- istic of the Lower Bala as the A. Powisii is of Middle Bala rocks. Numbers and Localities. a. 80, Pen Cerrig, Builth. (A most prolific locality, full of the fry of Trilobites.) a. 79, Pen Cerrig, Builth. Shineton, Buildwas. Pont Ladies Quarry, Llan- deilo. a. 78, N. of Builth. a. 97, Llandeilo. Porth Treuddyn, Caernar- vonshire (in b
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