. Palæontology ... , del BowerL&C° PLATE XXIV PAGB Fig. 19. AXCTLOCEKAS PERCOSTATUS. 138 Two fifths of natural size. PA LuE OTTCOMJ y-YoWliyjDL nwg if fittiffr»k (Cretaceous.) jPJjATE! WMGrabb. del l)owen& C° lith. PLATE XXV. PAGE Fig. 20. Helicamcylus jequicostatus. Top view of the spiral. 141 20 a. Front view of the b, c, d. Three views of the straight e. Side view of the largest Cross section of aperture. 20 g. Septum. Fig. 21. Diptychoceras uevis. 144 21 a. Cross section of the two smaller limbs, at the point of fracture of th
. Palæontology ... , del BowerL&C° PLATE XXIV PAGB Fig. 19. AXCTLOCEKAS PERCOSTATUS. 138 Two fifths of natural size. PA LuE OTTCOMJ y-YoWliyjDL nwg if fittiffr»k (Cretaceous.) jPJjATE! WMGrabb. del l)owen& C° lith. PLATE XXV. PAGE Fig. 20. Helicamcylus jequicostatus. Top view of the spiral. 141 20 a. Front view of the b, c, d. Three views of the straight e. Side view of the largest Cross section of aperture. 20 g. Septum. Fig. 21. Diptychoceras uevis. 144 21 a. Cross section of the two smaller limbs, at the point of fracture of the specimen. 21 h. Septum. PAXffiR QT*T OiD l?y .ViDDti JET. (Cretaceous.) mmwmiifio WltACm S3,
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectpaleontology, bookyea
