. Mesozoic fossils. ere col-lected at the Cowgitz coal mine, on Graham Island (one cf the QueenCharlotte Islands) by Mr. James Richardson in 1872, and by Dr. G. in 1878. No other land or fresh water shells have yet been recorded as occur-ring in the Cretaceous rocks of the Nanaimo, Comox, or Cowitchan coalfields. But in March, 1894, a nearly perfect but somewhat crushed andslightly distorted bivalve shell was found by Mr. W. Haggart, in shaleat the top of No. 6 Pit, Wellington Colliery, Nanaimo. This specimenis now the property of the Provincial Museum, Victoria, , and hasbeen for
. Mesozoic fossils. ere col-lected at the Cowgitz coal mine, on Graham Island (one cf the QueenCharlotte Islands) by Mr. James Richardson in 1872, and by Dr. G. in 1878. No other land or fresh water shells have yet been recorded as occur-ring in the Cretaceous rocks of the Nanaimo, Comox, or Cowitchan coalfields. But in March, 1894, a nearly perfect but somewhat crushed andslightly distorted bivalve shell was found by Mr. W. Haggart, in shaleat the top of No. 6 Pit, Wellington Colliery, Nanaimo. This specimenis now the property of the Provincial Museum, Victoria, , and hasbeen forwarded to the writer by Dr. C. F. Newcombe, of that city, forexamination and comparison. Judging by its external form and surface markings, this fossil seemsto be a specimen of a previously undescribed species of Unio, that isquite distinct from U. Hubhardi and from any of the Unionidje of theCretaceous or Laramie rocks of North America. 386 The species may now be provisionally named and characterized asfollows :—. - Unio Nanaimoensis (Sp, nov.) Shell compressed-convex, ovately subelliptical, much longer than high,higher than broad, and very inequilateral. Anterior end short, rounded ; posterior end muchlonger than the an-terior, its extremityobliquely subtrun-cate above, produ-ced and somewhatnarrowly roundedbelow; beaks pla-ced in advance ofthe mid length ; pos-terior umbonal slo-pes not at all angu-lated. Surface markedonly with numerousconcentric lines ofgrowth. Hinge den-tition, muscular im-pressions, and pal- FiG. 21.— Unio Ifanaimoensis.—Side view of the only specimen Hal line unknown. known, in 27a.—Dorsal view of the same, also in outline, to shew the Approximateproportionate convexity of the closed valves. dimensions of the Both the figures are of the natural size. «>^ ecimen figured:— Maximum length,sixty-eight millimetres ; greatest height, thirty-seven millimetres ; maxi-mum breadth or thickness, twenty-four millimetres. The slight distor
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Keywords: ., bookcentur, bookdecade1870, booksubjectpaleontology, bookyear1876
