. Bulletins of American paleontology. 294 Bulletin 180. Text-fig. 2. Jsog)20»ion uuixHIj/j (Lk.). Diagram showing the apical angle: 53°. I .uuilv MLSELIJDAE Lsogiioinoii inaxillata i LanuiK k i PI. 24, figs. 3a-b; Text-fig. 10 1819. Perna nuixilLita Lamarck, Animaux sans vertcbres, t. VII, p. 142, 2 cme ed., Deshayes, 1836 t. VII, p. 78. 1840. Perna 7naxillatu Lamarck, Cf)nrad, Fossils Medial Tertiary, p. 52, pi. 27, fig. 1. 1904. Medina ?)hixilLild (Lamarck), Glenn, Maryland Geol. Siir., Miocene, p. 383, pis. 52, 53. 1898. Perna cf. maxillata Lamarck, Sacco, Terziari Piemonte e Liguria, t. XX
. Bulletins of American paleontology. 294 Bulletin 180. Text-fig. 2. Jsog)20»ion uuixHIj/j (Lk.). Diagram showing the apical angle: 53°. I .uuilv MLSELIJDAE Lsogiioinoii inaxillata i LanuiK k i PI. 24, figs. 3a-b; Text-fig. 10 1819. Perna nuixilLita Lamarck, Animaux sans vertcbres, t. VII, p. 142, 2 cme ed., Deshayes, 1836 t. VII, p. 78. 1840. Perna 7naxillatu Lamarck, Cf)nrad, Fossils Medial Tertiary, p. 52, pi. 27, fig. 1. 1904. Medina ?)hixilLild (Lamarck), Glenn, Maryland Geol. Siir., Miocene, p. 383, pis. 52, 53. 1898. Perna cf. maxillata Lamarck, Sacco, Terziari Piemonte e Liguria, t. XXV, p. 26, pi. VII, fig. 1. Thirty-nine specimens studied of which four were complete and three were internal molds (Coll. Nat. Museum, Wash., D. C.) —Large Al}7/7//'j-shaped shell, with pointed beak and pos- terior side forming a regularly rounded arc; ligamental area generally broad, but sometimes narrow and long, the specific character is the apical angle (Text-fig. 2) which varies between 42 and 53 degrees. Number of grooves are generally 1 6 to 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 Paleontological Research Institution (Ithaca, N. Y. ); Columbia University. Ithaca, N. Y. , Paleontological Research Institution [etc. ]
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