. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. 42 Mr. A. S. Woodward on the the largest is given in the accompanying woodcut, fig. Breadth of Length of Median Plate. Median Plate, 0-023 0-0065 0-027 0-008 a-030 0-008 0-035 0-010 0-038 0-0105 0-045 0-0105 0-047 0-010 0-061 0-012 . 0-078 0-012 The crown is deep and the grinding-surface has a slightly arched contour, flattened in the middle. Lower Dentition o/Myliobatis Dixoni. No. of Specimen, Brit. Mus. 1. P. 4457 c II. 25660 III. 25620 IV. 37758 V. P. 438 VI. 25
. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. 42 Mr. A. S. Woodward on the the largest is given in the accompanying woodcut, fig. Breadth of Length of Median Plate. Median Plate, 0-023 0-0065 0-027 0-008 a-030 0-008 0-035 0-010 0-038 0-0105 0-045 0-0105 0-047 0-010 0-061 0-012 . 0-078 0-012 The crown is deep and the grinding-surface has a slightly arched contour, flattened in the middle. Lower Dentition o/Myliobatis Dixoni. No. of Specimen, Brit. Mus. 1. P. 4457 c II. 25660 III. 25620 IV. 37758 V. P. 438 VI. 25821 VII. P. 1508 a Till. 25641 IX. P. 4458 Of these fossils the third was figured by Dixon as the type of a new species, M. contractus, while in the sixth the original surface is preserved—a fact which led the same author to refer it to M. striatus. The so-called M. heteropleurus may also be placed here with considerable certainty, the median teeth of the type specimen measuring 0*022 by 0*0065, and the lateral teeth, so far as preserved, likewise exhibiting the characters of those of M. Dixoni. I have seen no other fossils like this from Sheppey, and, as already stated by Agassiz, his determination of its being derived from the London Clay is hypothetical. Range. Barton and Bracklesham Beds. Myliobatis striatus^ Agassiz. (PL I. figs. 5-9.) 1833-43. Mi/liobafis striatus, Agassiz, Poiss. Foss. vol. iii. p. 320. 1833-43. Myliohatis punctatus, Agassiz, torn. cit. p. 322, pi. xlvii. figs. 11, 12. 1837. Myliobatis striatiis, Buckland, Geol. and Min. 2ad edit. vol. ii. pi. xxvii. d, tig. 14. 1850. Myliobatis irregularis, Dixon, Foss. Suss. p. 199, pi. xi. fig. 15. 1850. Myliobatis Edwardsii, Dixon, op. cit. p. 199, pi. xi. tig. 16. A specimen of the lower dentition from the Barton Clay,. 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 resem
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