acad nat sci phila

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Maryland Geological Survey: Miocene Sharks Teeth of Calvert County
... and considerably abraded dermal tubercle. (Type specimen.) Charles County near the Patuxent River. Acad. Nat. Sci., Phila. Figs. 3a, 3b. Myliobatus gigas Cope. 3a) Oral surface of the upper dental ... the figure) fractured and imperfect. (Type specimen.) Charles County near the Patuxent River. Acad. Nat. Sci., Phila, 3b) Transverse view of the same specimen, taken across its posterior end (at ...
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Maryland Geological Survey: Miocene Sharks Teeth of Calvert County
... Acad. Nat. Sci. Phila., vol. xix, pp. 144, 152. Cynorca proterva Cope, 1868, Proc. Acad. Nat. Sci. Phila., vol. xx, p. 185. Squalodon protervus Cope, 1867, Proc. Acad. Nat. Sci. Phila., vol. xix, p. 151. Squalodon protervus Leidy, 1869, Jour. Acad. Nat. Sci. Phila ...
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