Catalogue of the fossil Reptilia and Amphibia in the British Museum (Natural history) ..By Richard Lydekker .. . Wootton-Eassett. Cunning ton Collection. Purchased, 1849. R. 271. The centrum of a middle dorsal vertebra of smaller size;from the Kimeridge Clay. Egerton Collection. R. 9. The centrum of an early posterior dorsal vertebra probably{Pig.) belonging to this species; from the Kimeridge Clay ofStanton, near , Suffolk. In this speci-men (fig. 13) the terminal faces are elongated transversely,and not narrowed superiorly ; the vertical diameter being0,111 (4*0 inches), and
Catalogue of the fossil Reptilia and Amphibia in the British Museum (Natural history) ..By Richard Lydekker .. . Wootton-Eassett. Cunning ton Collection. Purchased, 1849. R. 271. The centrum of a middle dorsal vertebra of smaller size;from the Kimeridge Clay. Egerton Collection. R. 9. The centrum of an early posterior dorsal vertebra probably{Pig.) belonging to this species; from the Kimeridge Clay ofStanton, near , Suffolk. In this speci-men (fig. 13) the terminal faces are elongated transversely,and not narrowed superiorly ; the vertical diameter being0,111 (4*0 inches), and the transverse 0,128 (5*0 inches).The costal tubercles are placed low and have nearlycoalesced. The difference in the contour of this specimencompared with the next is parallelled in the vertebral columnof I. jplatyodon, No. 481 (p. 101), where tho centra marked26 and 27 are of the contour of the present specimen,while that marked 33 is of the type of the next the present specimen, however, the costal tubercleshave descended lower than in the corresponding vertebne 26 ICHTHYOPTERYGIA. Pig. Ichthyosaurus trigonus.—Left lateral and anterior aspects of the centrum ofan early posterior dorsal vertebra ; from the Kirueridge Clay of Stanton.§. a, upper, b, lower costal tubercle. of /. platyodon. The variations in the relations of thecostal tubercles are noticed in the above-mentionedvertebral column of the latter species. Purchased, 1880. 24684 d. The centrum of a large late posterior dorsal vertebra; (Fig.) from the Kimeridge Clay of Wootton-Bassett. This specimen (fig. 14) agrees with Phillipss description (op. cit. Pig. 14.
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