Note on some of the Generic Modifications of the Plesiosaurian Pectoral Arch

  title={Note on some of the Generic Modifications of the Plesiosaurian Pectoral Arch},
  author={Harry Govier Seeley},
  journal={Quarterly Journal of the Geological Society of London},
  pages={436 - 449}
  • H. Seeley
  • Published 1 February 1874
  • Geography
  • Quarterly Journal of the Geological Society of London
If not having a sternum the Plesiosauria differ from the Crocodilia and from all the Lacertian orders of Reptiles. Serpents with limbs being as yet undiscovered, the only true Reptilia which admit of comparison with Plesiosaurs in the pectoral bones are the Chelonians. And even here, at first sight, the resemblance is not so evident as to command attention; for the shapes of the plastron-bones in embryonic Tortoises are more suggestive of the pectoral and pelvic girdles of Plesiosaurians than… 

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