. Acadian geology [microform] : the geological structure, organic remains and mineral resources of Nova Scotia, New Brunswick and Prince Edward Island. Geology; Paleontology; Geology; Geology; Geologie; Paléontologie; Géologie; Géologie. a flattened or ardiiial margin 3 of the beak ; finely striated, ititial addition, lie shell; strite â¢ire fine, close, Fig. 200. iMHCtes htiuislfiiilii. Fig. 202. tococUa intcrmeilki. ongcr below the the margin, 'rt of the Clinton ventricose shell; :;losely arranged, c C. cornuta \\w increase only by A stronger and beak to base of 1. J. W. D. ni-oval, twice
. Acadian geology [microform] : the geological structure, organic remains and mineral resources of Nova Scotia, New Brunswick and Prince Edward Island. Geology; Paleontology; Geology; Geology; Geologie; Paléontologie; Géologie; Géologie. a flattened or ardiiial margin 3 of the beak ; finely striated, ititial addition, lie shell; strite â¢ire fine, close, Fig. 200. iMHCtes htiuislfiiilii. Fig. 202. tococUa intcrmeilki. ongcr below the the margin, 'rt of the Clinton ventricose shell; :;losely arranged, c C. cornuta \\w increase only by A stronger and beak to base of 1. J. W. D. ni-oval, twice as ^e-linc equallinj^' closely arranged dditions, and arc n of the shell is ceding, the stria' size much more e closely striated Arisaig, East elliptical; dorsal long the centre; ons six or seven fV FOS8ILH. ft97 on each side of the mesial fold and sinus, strong, and much elevated, subangular, crossed by numerous strongly elevated, Inmcllosc, imbri- cating concentric stria;. The specimens examined are almost all imperfect , some of which preserve the imi)res8ion of the strong concentric striae, and in one or two .specimens an impression of the shell reveals the strength of the surface nuirkings. In many respects this species resembles the *S'. perlatnrllosa of the LoM'cr Helderberg group in New York, but the mesial elevation of this species is flattened or depressed, a character never observed in New York specimens. Arisaig, East Hiver, coll. J. W. D. Spirifcr suhsulcatiis, Hall. Shell scmi-cUiptical, hingc-linc equalling or greater than the length of the shell below; plications five or six on each side of the mesial fold; mesial fold somewhat flattened or very slightly rounded on the summit; plications rounded; surface concentrically Tiie specimens are all casts, or impressions of the shells. They bear some resemblance to S. sulcalus of the Niagara group, and arc intermediate between that species and the S. cycloptera of the Ijower Helderberg group.
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Keywords: ., boo, bookcentury1800, booksubjectgeology, booksubjectpaleontology
