. The Bashford Dean memorial volume : archaic fishes. Fishes; Sharks; Fishes, Fossil. The Structure of Dinichthys 171 described. Therefore all the previously mentioned investigators have not noticed that the ventral shield makes it possible for us to determine the exact breadth of the fish. In reality, the distance between the two extreme corners of both the antero-ventro-lateral plates (Text-figure 61), to which the extreme corner of AL was attached, gives us the maximum breadth of the ventral side of Dinichthys. This measurement is of very great value as it is the only exact measure of the b
. The Bashford Dean memorial volume : archaic fishes. Fishes; Sharks; Fishes, Fossil. The Structure of Dinichthys 171 described. Therefore all the previously mentioned investigators have not noticed that the ventral shield makes it possible for us to determine the exact breadth of the fish. In reality, the distance between the two extreme corners of both the antero-ventro-lateral plates (Text-figure 61), to which the extreme corner of AL was attached, gives us the maximum breadth of the ventral side of Dinichthys. This measurement is of very great value as it is the only exact measure of the breadth of the fish we know. It helps very much in reconstructing the outline of Dinichthys. All the plates in the ventral shield are quite flat and relatively thin. But we have no reason to suppose that they have been strongly deformed and flattened by pressure. It is probable that they were in reality flat. No distinct clefts of other traces of marked deformation, like those in some plates in the dorsal carapace or the head, are to be found here. It is also doubtful whether the ventral shield was strongly curved, as the curving would shorten the distance between its two extreme angles, and thus make the whole carapace narrower, which is very improbable. AMV AMV,. Text-figure 56. The antero-ventro-lateral plate shown from the inside. ex, exterior margin; gz, grooved zone; rd, ridges; s^, sockets; w, wall around front and side margins. Text-figure 57- The antero-ventro-lateral plate figured from the outside. «c, exterior margin; rd, ridges; sl{, 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 Dean, Bashford, 1867-1928; Gudger, E. W. (Eugene Willis), 1866-1956. New York : Published by order of the trustees
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Keywords: ., book, bookcentury1900, booksubjectfishes, booksubjectfishesfossil
