. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. 78 Mr. R. Walker on Fossil Fishes of Dura Den. there is a row of small slightly hooked teeth extending round its lower border. The lower jaws appear to be strong, and are somewhat power- ful-looking bones : there are two distinct rows of plates on each side between the rami and the two centi*al jugular plates; the Fig. !»q Crushed head of H. Flemingii. outermost row is the largest; their exterior margins seem to have been overlapped a little by the inferior edge of the ram
. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. 78 Mr. R. Walker on Fossil Fishes of Dura Den. there is a row of small slightly hooked teeth extending round its lower border. The lower jaws appear to be strong, and are somewhat power- ful-looking bones : there are two distinct rows of plates on each side between the rami and the two centi*al jugular plates; the Fig. !»q Crushed head of H. Flemingii. outermost row is the largest; their exterior margins seem to have been overlapped a little by the inferior edge of the rami, while they in turn overlapped the margins of the next; these plates are longer than broad, and meet each other by oblique sutures passing inwards. The inner row of plates is about half the breadth of the outer, and they join together by more transverse sutures. These plates or bones are continued back, and turned up, on the sides of the head, behind the articulation of the infe- rior maxilla, till they terminate below the inferior margin of the sub-operculum. So far as I can perceive, the cranium above described does not appear to differ in any respect from that of H. Ander- soni: the head of the latter species is not, in general, so well preserved; but so far as the bones are exposed, they seem to me to be the same in number, arrangement, and shape. Neither does it differ materially from the bones of the head of Glypto- pomus, as figured by Prof. Huxley; in fact, the resemblance in. 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 resemble the original London, Taylor and Francis, Ltd
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