. The Bashford Dean memorial volume : archaic fishes. Fishes; Sharks; Fishes, Fossil. 178 Bashford Dean Memoria] Volume (up), which forms a small process, must probably be regarded as the last frag- ment of the real spine which we find in other Arthrodira. The hind margin of Sp {hm), corresponding with the strong- ly convex front margin, is strongly cohcave. On the inside, nearly the whole plate is occupied by overlapping mar- gins. Only Its front part, divided from the hind part by an almost vertical line, is rounded and smooth (fm). The up- per corner was overlapped by AL {al). IL with its t
. The Bashford Dean memorial volume : archaic fishes. Fishes; Sharks; Fishes, Fossil. 178 Bashford Dean Memoria] Volume (up), which forms a small process, must probably be regarded as the last frag- ment of the real spine which we find in other Arthrodira. The hind margin of Sp {hm), corresponding with the strong- ly convex front margin, is strongly cohcave. On the inside, nearly the whole plate is occupied by overlapping mar- gins. Only Its front part, divided from the hind part by an almost vertical line, is rounded and smooth (fm). The up- per corner was overlapped by AL {al). IL with its thickened hind margin comes in contact with the lower process {il) on the lower margin. Lastly, AVL with its long side process touches the spinal from the inside, fitting into the im- pression on its concave hind margin (avl). Thus the spinal in Dinichthys serves to connect AL, IL and Text-figure 65. The spinal plate of Dmichthys drawn: A, from the outside; B, from the inside. al, part overlapped by AL; avl, part overlapped by AVL. fm, front convex margin; hm, hind concave margin; il, part overlapped by IL; Im, lower margin; Ip, lower process; pr, spine-like process which fits into Ai., iim, upper sigzag margin; u/3, upper process corresponding to the spine in other 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
