. Mesozoic fossils. rmation of Assiniboia and Alberta, in its much larger size,more nearly median beaks, and much straighter ventral margin. 382 CyPRINA (?) ANTHRACICOLA. (N. Sp.) Shell of medium size for the genus, presumably compressed convexnormally, though all the specimens that the writer has seen are crushedflat. In this condition they are rounded subovate and very little longer than high. The anterior side is shortand rounded ; the posterior side alittle longer, its extremity subtrun-cate abruptly and somewhat oblique-ly above, and obtusely subangularbelow. The ventral margin is broad-l
. Mesozoic fossils. rmation of Assiniboia and Alberta, in its much larger size,more nearly median beaks, and much straighter ventral margin. 382 CyPRINA (?) ANTHRACICOLA. (N. Sp.) Shell of medium size for the genus, presumably compressed convexnormally, though all the specimens that the writer has seen are crushedflat. In this condition they are rounded subovate and very little longer than high. The anterior side is shortand rounded ; the posterior side alittle longer, its extremity subtrun-cate abruptly and somewhat oblique-ly above, and obtusely subangularbelow. The ventral margin is broad-ly rounded; the superior borderslopes abruptly downward in frontof the beaks, and much more gradu-ally so behind them ; the beaks arecompressed, slightly depressed, andplaced considerably in advance of themid-length of the cardinal margin. Surface marked with very numer-ous and closely disposed, fine concen-tric ridges, or raised lines of growth,and a few much coarser and moredistant concentric sulcations. Fig. 26.—Cyprina{^) anthracicola. Sideview of the most perfect but not thelargest specimen collected, of the natu-ral size and shewing the right is crushed quite flat. Hinge dentition and muscular impressions unknown. The largest specimen that the writer has seen is sixty-five millimetreslong and sixty millimetres high. Roof of coal, No. 1 shaft, Nanaimo: two nearly perfect, but crushedand flattened specimens, and four very imperfect ones, all collected in1901, the specimen figured, by the Rev. G. W. Taylor, and the others byMr. Harvey. It is just possible that these specimens may prove to be only immatureexamples of C. Denmanensis, but their beaks are by no means submedianand their marginal outline seems to be more rounded than triangular. Protocardia scitula. Meek. Cardium scituluin, Meek. 1857. Trans. Albany last., vol. iv, p. 40. Protocardia scitula, Meek. 1876. Bull. Geol. and Geogr. Surv. Terr., vol. ii, no. 4, p. 360, pi. 3, figs. 4 and 4
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Keywords: ., bookcentur, bookdecade1870, booksubjectpaleontology, bookyear1876
