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16. Lepidosteus osseus [sic] L. = Lepisosteus osseus (Linnaeus, 1758)
17. Heterolepidotus latus Eg. = Heterolepidotus latus Egerton, 1872
18. Amia calva = Amia calva Linnaeus, 1766
19. Aspidorhynchus sp. = Aspidorhychiformes sp.
20. Eugnathus sp. = Furidae sp.
21. Acanthodes sp. = Acanthodiformes sp.

English: Scales of the Longnose Gar (16) and Bowfin (18) compared to those of Neopterygii (17, 19) and spiny shark (20) fossils.

16. Fragment of the bony scale layers, enlarged
17. Central portion of vertical section of scale, enlarged
18. Vertical section through a cranial plate, enlarged
19. Vertical section through a scale, enlarged
20. Vertical section through the edge of a scale, enlarged
21. Near-parallel section of a scale, enlarged

bc = bone cell, bt = branching canaliculus, gn = ganoine, i = inner bony laminae of isopedine, ir = inner (older) region, ol = outermost (newest) layer, tu = tubule with branching inner end.
Date (published 1908)
Source Proceedings of the Zoological Society of London (vol. 1907 issue 4, plate XLVI)
Author E.S.Goodrich
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