. The Bashford Dean memorial volume : archaic fishes. Fishes; Sharks; Fishes, Fossil. 160 Bashford Dean Memorial Volume MB. Text-figure 42. A total reconstruction of the head of Dinichthys seen from the side. ASG, antero-supra-gnathal; £B, externo-basal; C, central; IG, infero-gnathal; M, marginal; MB, median-basal; Nr, nostril; P, pineal; PM, post-marginal; Pl^, post-nasal; PSG, postero-supra-gnathal; PrO, pre-orbital; PSO, post-sub-orbital; PtO, post-orbital; R, rostral; SO, sub-orbital. The whole body carapace can be divided into a dorsal shield; a ventral shield; and the plates connecting
. The Bashford Dean memorial volume : archaic fishes. Fishes; Sharks; Fishes, Fossil. 160 Bashford Dean Memorial Volume MB. Text-figure 42. A total reconstruction of the head of Dinichthys seen from the side. ASG, antero-supra-gnathal; £B, externo-basal; C, central; IG, infero-gnathal; M, marginal; MB, median-basal; Nr, nostril; P, pineal; PM, post-marginal; Pl^, post-nasal; PSG, postero-supra-gnathal; PrO, pre-orbital; PSO, post-sub-orbital; PtO, post-orbital; R, rostral; SO, sub-orbital. The whole body carapace can be divided into a dorsal shield; a ventral shield; and the plates connecting these two parts. THE DORSAL SHIELD The dorsal shield is composed of nine plates, namely; the single median-dorsal, the rights and lefts of the antero-dorso'lateral, of the postero-dorso-lateral, and of the antero-lateral and postero'lateral. Median-Dorsal.—This plate (Text-figures 44 and 45) is the largest in the whole armor of Diyiichthys. In a large specimen of Dinichthys terrelli Nwb. it may measure along the median line (without the process) up to 50 cm.; across the broadest part 65 cm., and nearly 10 cm. in the thickest part. Its form and proportions are known from figures and descriptions in older works (Newberry, Claypole, Eastman, Dean, Hussakof). I shall therefore here point out only some especially significant 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
