Catalogue of the fossil Reptilia and Amphibia in the British Museum (Natural history) ..By Richard Lydekker .. . n upper and a lower costaltubercle on the centrum2; caudals with a single tubercle ; neural 1 In the nomenclature of this bone the usual determination is , however (Anat. Anzeig. vol. i. p. 348, 1886, and vol, ii. p. 657, 1887 ; seealso Amer. Nat. vol. xxi. p. 838, 1887), reverses the names of the two boneshere termed supratemporal and squamosal. The bone here termed supratem-poral is the prosquamosal of Owen, and the supraquadrate of Seeley; andis identified by Baur wi
Catalogue of the fossil Reptilia and Amphibia in the British Museum (Natural history) ..By Richard Lydekker .. . n upper and a lower costaltubercle on the centrum2; caudals with a single tubercle ; neural 1 In the nomenclature of this bone the usual determination is , however (Anat. Anzeig. vol. i. p. 348, 1886, and vol, ii. p. 657, 1887 ; seealso Amer. Nat. vol. xxi. p. 838, 1887), reverses the names of the two boneshere termed supratemporal and squamosal. The bone here termed supratem-poral is the prosquamosal of Owen, and the supraquadrate of Seeley; andis identified by Baur with the squamosal. 2 In the first few vertebrae the upper tubercle may be partly or entirely onthe arch. b2 4 ICHTHYOPTERTGIA. arches attached by synchondrosis to flat surfaces on between the skull and atlas, and between atlas andaxis. Dorsal ribs double-headed. Hibs present in the caudalregion; no uncinate processes; chevrons not united ribs present; no sternum. In pectoral girdle (fig. 4)clavicles and a T-shaped interclavicle ; coracoids not overlapping, and Pig. Ichthyosaurus (cf.) entheciodon.—The centrum of an anterior dorsal vertebra,viewed in section, and from the anterior and left lateral aspects ; from theKiineridge Clay of Wiltshire. £. Pig. 4.
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Keywords: ., bookauthorlydekkerrichard184919, bookcentury1800, bookdecade1880
