. Bulletin of the British Museum (Natural History), Geology. 278 EVOLUTION OF THE SNOUT IN ACTINOPTERYGIANS Ssc Exsc .P Pa Sop. Fig. 5. Nematoptychius greenocki (Traquair). Reconstruction of skull in lateral view. The skull of N. greenocki is long with an oblique suspensorium and the orbit situated well forward. The suprascapulars just meet in the mid-line anteriorly as do the single pair of extrascapular bones which precede them. The remainder of the skull roofing bones are known with much more certainty in this species than in most other palaeoniscoids of comparable age, since there ar
. Bulletin of the British Museum (Natural History), Geology. 278 EVOLUTION OF THE SNOUT IN ACTINOPTERYGIANS Ssc Exsc .P Pa Sop. Fig. 5. Nematoptychius greenocki (Traquair). Reconstruction of skull in lateral view. The skull of N. greenocki is long with an oblique suspensorium and the orbit situated well forward. The suprascapulars just meet in the mid-line anteriorly as do the single pair of extrascapular bones which precede them. The remainder of the skull roofing bones are known with much more certainty in this species than in most other palaeoniscoids of comparable age, since there are several specimens in which the cranial buckler has been preserved uncrushed, and some in which the whole head has been preserved in the round ( , , ). The paired parietals are rectangular with their anterior margins produced into a point (Text-fig. 6) and the sutures between them and the frontals anteriorly and the dermopterotics laterally are strongly digitated. The frontals are long and all the sutures between them and the other skull roofing bones equally toothed and digitate. Laterally the frontal is bordered by the dermopterotic, dermosphenotic and the nasal, whilst anteriorly the postrostral has a V-shaped insertion between the two frontals. The lateral wall of the skull roof is comprised of three bones, the dermopterotic, the dermosphenotic and the infraorbito-supraorbital. The dermopterotic is the largest of these three bones and anteriorly joins the dermosphenotic. The dermo-. 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 British Museum (Natural History). London : BM(NH)
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