. A book of whales. Whales. SOME INTERNAL STRUCTURES covering skull and not a also, as in other mammals ; this, at any rate, applies to the majority. In the extinct Zeuglodonts, which in many other respects conform to a more generalised mammalian condition, these bones are, so to speak, normal ; but among the toothed whales they do not meet above, and the part of the roof of the skull which should be occupied by the parietals is invaded by the huge supra-occipital. This does not, however, apply to the whalebone whales, though it o appears to do so. In these whales the foetus has normal parieta
. A book of whales. Whales. SOME INTERNAL STRUCTURES covering skull and not a also, as in other mammals ; this, at any rate, applies to the majority. In the extinct Zeuglodonts, which in many other respects conform to a more generalised mammalian condition, these bones are, so to speak, normal ; but among the toothed whales they do not meet above, and the part of the roof of the skull which should be occupied by the parietals is invaded by the huge supra-occipital. This does not, however, apply to the whalebone whales, though it o appears to do so. In these whales the foetus has normal parietals meeting above ; in the adult the upper portion of the bones is overlaid by the supra - occipitals. We have here the first stage in the disappearance of the median portion of the parie- tals ; being overlaid by the supra-occipitals their function ceases, and, in accordance with what is always found 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 Beddard, Frank E. (Frank Evers), 1858-1925. London, J. Murray; New York, G. P. Putnam's sons
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Keywords: ., bookauthorbeddardf, bookcentury1900, bookdecade1900, bookyear1900
