. A descriptive catalogue of the marine reptiles of the Oxford clay. Based on the Leeds Collection in the British Museum (Natural History), London ... Reptiles, Fossil. 150 MAEINE REPTILES OF THE OXFOED CLAY, missing. Some of the elements are so little distorted that it has been possible to join them together again in their natural position, as in the case of the basis cranii and the pterygoids shown in test-figure 74. The general form of the skull, as a whole, cannot be made out with certainty, but it must have been very similar to that of Murcenosaurus (text-figs. 46, 47), since the individu
. A descriptive catalogue of the marine reptiles of the Oxford clay. Based on the Leeds Collection in the British Museum (Natural History), London ... Reptiles, Fossil. 150 MAEINE REPTILES OF THE OXFOED CLAY, missing. Some of the elements are so little distorted that it has been possible to join them together again in their natural position, as in the case of the basis cranii and the pterygoids shown in test-figure 74. The general form of the skull, as a whole, cannot be made out with certainty, but it must have been very similar to that of Murcenosaurus (text-figs. 46, 47), since the individual bones are for the most part like the corresponding elements in the skull of tliat genus. In consequence of this general similarity the bones will not be described in detail, except where they present peculiar features. In the hasioccipital (text-figs. 73-74) the occipital condyle {) is more strongly convex, and the pterygoid processes are relatively larger than in Murcenosaurus. The united exocci^ntal and oinsihotic (text-fig. 72) are not so stout, and the paroccipital J^9. J'^S Eight esoccipitaUopisthotie of Trideulus seelci/i: A, from inner side; B, from outer side; C, from front. (E. 3539, nat. size.) Of., cavity for ampulla of posterior vertical semicircular caual; , facet for union with the hasioccipital; , channel for horizontal semicircular canal; jv(j., jugular foramen; , surface for union with prootic; , channel for posterior vertical semicircular canal: ([.f., facet for quadrate ; , surface for union \^â ith supraoccipital; sut., line of juncture between the eioccipital and opisthotic; XII, foramen for the XII nerve. processes, the distal ends {) of which are much expanded, are longer and more slender than in Mwcenosaurus. The line of union (sut.) between the exoccipital and opisthotic elements is clearly traceable on the inner face and on the surfaces for union with the basi occipital () and supraoccipital (soc
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectreptile, bookyear1910
