. The Canadian journal of science, literature and history. NOTES ON THE FOSSILS OF ONTARIO. 143 91. Pentamerus occidentalis, Hall. Guelph Formation, Hes- peler, Guelpli and Elora. 92. Trimerella grandis, Billings. Guelph Formation, Hespeler. 93. Trimerella ACUMINATA, "Billings. Guelph Formation, Hespeler. 94. DiNOBOLUS Galtensis, Billings. Guelph Formation, Hespeler. 95. DiNOBOLUs, sp. Casts of a Dinoholus which is clearly distinct from the preceding occur at Hespeler and Elora in the Guelph For- mation. 96. Megalomus Canadensis, Hall. {Eef. Pal. , Vol. II., pi. Ixxx. figs, la-e,
. The Canadian journal of science, literature and history. NOTES ON THE FOSSILS OF ONTARIO. 143 91. Pentamerus occidentalis, Hall. Guelph Formation, Hes- peler, Guelpli and Elora. 92. Trimerella grandis, Billings. Guelph Formation, Hespeler. 93. Trimerella ACUMINATA, "Billings. Guelph Formation, Hespeler. 94. DiNOBOLUS Galtensis, Billings. Guelph Formation, Hespeler. 95. DiNOBOLUs, sp. Casts of a Dinoholus which is clearly distinct from the preceding occur at Hespeler and Elora in the Guelph For- mation. 96. Megalomus Canadensis, Hall. {Eef. Pal. , Vol. II., pi. Ixxx. figs, la-e, figs, \ar-f, and pi. Ixxxii. figs. \a-i.) Casts of this singular shell are not very rare in the Guelph Formation at Hespeler, Guelph, Gait and Elora. 97. Megalomus compressus, Nicholson and Hinde. Shell equi- valve, valves compressed, the depth of both valves being little more than one-third of the width. Form elliptical, the length nearly one- third greater than the width. Umbones anterior, incrassated, with apparently one cardinal and two lateral teeth. A single, deep, con- centrically-striated muscular impression placed just in front of and beneath the umbones, with a small circular pit above it. Pallial line simple. Surface of the shell Fig. 6.—Megalomtis compressus, Nich. and Hinde. A, Side view of the cast of the shell, natural size. B, The same viewed from above, ad, Cast of the adductor impression ; p, Pallial Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Toronto : Canadian Institute, 1868-1878
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