. A catalogue of the collection of Cambrian and Silurian fossils contained in the Geological Museum of the University of Cambridge. Paleontology; Paleontology. 44 UPPER CAMBRIAN. Case and Column of Drawers. Reference to McCoy's Synopsis: and Figures of Genera. G case PI. 1 B, fig. 25, p. 41. {Lace-corals, &c).. Phyllopora. Gl Gl Gl Berenicea. PI. 1 C, fig. 17, p. 45. p. 46. PI. 1 c, fig. 15. Gl Gl Gl PI. 1 c, fig. 14, p. 47. PI. 1 c, fig. 16, p. 46. {P. acuta, p. 45 also). Names and References ; Observations, &c. Petraia uniserialis, McCoy, a small short species. Polyzoa (Bryozoa, Ehre
. A catalogue of the collection of Cambrian and Silurian fossils contained in the Geological Museum of the University of Cambridge. Paleontology; Paleontology. 44 UPPER CAMBRIAN. Case and Column of Drawers. Reference to McCoy's Synopsis: and Figures of Genera. G case PI. 1 B, fig. 25, p. 41. {Lace-corals, &c).. Phyllopora. Gl Gl Gl Berenicea. PI. 1 C, fig. 17, p. 45. p. 46. PI. 1 c, fig. 15. Gl Gl Gl PI. 1 c, fig. 14, p. 47. PI. 1 c, fig. 16, p. 46. {P. acuta, p. 45 also). Names and References ; Observations, &c. Petraia uniserialis, McCoy, a small short species. Polyzoa (Bryozoa, Ehrenberg). Placed here, as a high type of the Radiata (Ccelenterata, Huxley) by Prof. McCoy. Naturalists usu- ally, and with good reason, allot them a place with the molluscoids—near the Tuni- cate group. The Lace coral and most of the deep sea minute corals, as they are called, are really Bryozoa. But they assume so much of the aspect of branching corals, that it is convenient to arrange them with them in the cabinet—especially as in fossil forms it is not always possible to separate these two widely remote groups. A Polyzoon is nearer to a Terebratula than to the coral it imitates. Berenicea heterogyra, McCoy, a flat patch of cells, growing on shells. Berenicea heterogyra, var. Ptilodictya costellata, McCoy (Genus Sticto- pora of Hall). The genus consists of branch- ed fronds, flat or rather slightly convex on each side with regular cells on either face. The quincunx arrangement of these gives an elegant pattern in the cast. There are very many species—and the genus ranged over the world in Palseozoic time. Ptilodictya fucoides, McCoy. A narrow-leaved form. Ptilodictya explanata, McCoy. A broad- leaved, crisped and undulated frond, with large cells. Ptilodictya dichotoma, Portlock, Geol. Rep. Londonderry and Tyrone, pi. 21, fig. 3), St. acuta of Hall is not the same as ours—but yet occurs in Britain. Numbers and Localities. a. 203, Llansantfraid (on tablet with P. subdup
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