A treatise on zoology . Chinmera monsirosa, L. S ? Fig. 144. (After Garman, from Dean.) A, ventral, and_B, front \iew ofliead. Recently, however, Jaekel [242rt, 243(x] has described some dermalplates in association with Ptyctodont teeth {Rhamiyhodus). In this genus,according to Jaekel, the dermal armour forming a pectoral girdle points. Fnv. Raleujhana, G. and B. (From Jordan and Evermann.) to an affinity with the Acijienseroidei ; but Dollo (121rt) contends withjustice that the armour of lihamphodus resembles rather that of the•Coccosteomorphi, with which he would associate the
A treatise on zoology . Chinmera monsirosa, L. S ? Fig. 144. (After Garman, from Dean.) A, ventral, and_B, front \iew ofliead. Recently, however, Jaekel [242rt, 243(x] has described some dermalplates in association with Ptyctodont teeth {Rhamiyhodus). In this genus,according to Jaekel, the dermal armour forming a pectoral girdle points. Fnv. Raleujhana, G. and B. (From Jordan and Evermann.) to an affinity with the Acijienseroidei ; but Dollo (121rt) contends withjustice that the armour of lihamphodus resembles rather that of the•Coccosteomorphi, with which he would associate them. The , like the Menaspidae, were almost certainly devoid of the spine i8o HOLOCEPHALI so characteristic of the dorsal fin of the Holocephali. A better knowledgeof the histological structure of the dermal plates of these families is muchneeded. Ptyctodus, Pander, Ehynchodus, Newb. ; Devonian, Europe and Palaeomylus, A. S. W. ; Devonian and Carboniferous, Ehamjjhodus, Jaekel ; Devonian, Germany. Family Menaspidae. In this family may be provisionally includedcertain incompletely known fossil fish the affinities of which are still veryuncertain, but which appear to be more closely related to the Holo-cephali than to any other order. Menaains has a generaV covering of denticles strengthened i
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishe, booksubjectzoology
