. Bulletin of the British Museum (Natural History), Geology. A REVIEW OF UPPER JURASSIC PLIOSAURS 161 as Giebel (1847) listed Owen's species Plesiosaurus macromus which is in no way connected with S. macromerus. Description of Lectotype. The lateral surface of the lectotype centrum bears two rib facets which are oval in outline, their long axes being directed antero- posteriorly. In this specimen the superior facet is smaller than the inferior. The. Fig. 7. Stretosaurus macromerus (Phillips). , Sedgwick Mus. Left femur in ventral view, x &. lateral surface between the base of the ne
. Bulletin of the British Museum (Natural History), Geology. A REVIEW OF UPPER JURASSIC PLIOSAURS 161 as Giebel (1847) listed Owen's species Plesiosaurus macromus which is in no way connected with S. macromerus. Description of Lectotype. The lateral surface of the lectotype centrum bears two rib facets which are oval in outline, their long axes being directed antero- posteriorly. In this specimen the superior facet is smaller than the inferior. The. Fig. 7. Stretosaurus macromerus (Phillips). , Sedgwick Mus. Left femur in ventral view, x &. lateral surface between the base of the neural arch and the superior rib facet is quite smooth with no suggestion of a ridge. The anterior articular surface is concave with a poorly developed mamilla at the centre ; the outline of the centrum is circular with a well-marked peripheral groove. The posterior articular surface is also concave and somewhat circular in outline, with its margin bevelled along the ventral edge and also between the base of the neural arch and the top of the rib facets. The GEOL. 4, 5. l6. 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 British Museum (Natural History). London : BM(NH)
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