. The Bashford Dean memorial volume : archaic fishes. Fishes; Sharks; Fishes, Fossil. Text-figure 30. The infero'gnathal and postero-infero-gnathal elements of Dinichthys mterrnedius Nwb., outside view. A, functional portion; B, blade; C, PIG; a, front "tooth"; b and c, tooth-like indentations on cutting part; b-c-e, cutting part; d, tubercles; im, joint impression on Text-figure 31. The infero-gnathal and postero-infero-gnathal plates of Dinichthys intermedius Nwb., inside view. A, functional portion; B, blade; C, PIG; a, front "tooth"; b and c, tooth-like indentatio
. The Bashford Dean memorial volume : archaic fishes. Fishes; Sharks; Fishes, Fossil. Text-figure 30. The infero'gnathal and postero-infero-gnathal elements of Dinichthys mterrnedius Nwb., outside view. A, functional portion; B, blade; C, PIG; a, front "tooth"; b and c, tooth-like indentations on cutting part; b-c-e, cutting part; d, tubercles; im, joint impression on Text-figure 31. The infero-gnathal and postero-infero-gnathal plates of Dinichthys intermedius Nwb., inside view. A, functional portion; B, blade; C, PIG; a, front "tooth"; b and c, tooth-like indentations on cutting part; b-c-e, cutting part; d, tubercles; fl, "floor" between blade and cutting part; tl{, thickening consoUdating the second indentation. composed of a long, thin blade (Text-figures 30 and 31 B) and of a solid, thick functional portion (Text-figures 30 and 31 A). These two parts are very sharply divided from the outside. It looks as if the functional portion is a separate plate placed on the blade. But, as Hussakof noted in 1906, these two portions in reality form one bone with one ossifica- tion centre. This is, however, very clearly seen on the inside. Of course, unlike ASG and PSG, the functional portion of IG has the worn area on the outside and is smooth on the inside. It is composed of a big front ''tooth" (Text- figures 30 and 31 a) and a cutting part (Text'figures 30 and 31 b, c, e). The front "tooth,". 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
