. The Paleozoic fishes of North America [microform]. Paleontology; Fishes, Fossil; Paléontologie; Poissons fossiles. I'lSilES OK THE CAKUOMll-'KUOUS BYHTKM. 95 llko tluit rupreseiitt'd in Fijr. 4, but rouiul(id below mid with coarsor orna- moiitatioii, like that of Fif^. •$, whicli is ji copy of a portion of a contml phito of tho ciirapacc, fonnd in tho sanio re^'ion, bnt miid Ijy Mr. Lilley, from whom I received it, to have come from iho Chemun-r rocks. GANORHYNcmrs Bkecfieki, n. sp. Plato XIX, Pig. 2. Head terminatinj,' anteriorly in a massive bony arch, of which the under surface is rounded
. The Paleozoic fishes of North America [microform]. Paleontology; Fishes, Fossil; Paléontologie; Poissons fossiles. I'lSilES OK THE CAKUOMll-'KUOUS BYHTKM. 95 llko tluit rupreseiitt'd in Fijr. 4, but rouiul(id below mid with coarsor orna- moiitatioii, like that of Fif^. •$, whicli is ji copy of a portion of a contml phito of tho ciirapacc, fonnd in tho sanio re^'ion, bnt miid Ijy Mr. Lilley, from whom I received it, to have come from iho Chemun-r rocks. GANORHYNcmrs Bkecfieki, n. sp. Plato XIX, Pig. 2. Head terminatinj,' anteriorly in a massive bony arch, of which the under surface is rounded and covered with a thick sheet of enamel, marked with pits of irregular size and distribution, tho mouths of calciirerous tubes. Of this bono the anterior face is vertical, the under surface flatly arched from front to roar, tlic posterior face transversely straijrlit in the middle, on tho sides excavated to form two largo rounded notches, perhaps tho nasal apertures. This interesting specimen apparently represents the labial margin of the upper jaw; a strong bony arch firmly anchylosed to the head, and covered with polished but porous enamel, forming a powerfid dental organ, fitted for crushing mollusks or crustaceans. It is evidently generically identical with, but specifically different from, a peculiar and uniipio speci- men found without labe^ or history by Dr. Henry Woodward among the material inherited by the South Kensington Museum from the liritish Museum, and described by Dr. R. H. Traquair' with the name of Gimorhyn- chus Woodwardi. The resemblances and differences between that specimen and the one before us will be apparent on comparing tho figures now given with those which accompany the article referred to. Dr. Traquair compares his specimen with the nasal extremity of the head of Diptenis, and gives apparently good reasons for considering it the labial margin of the upper jaw of a Dipnoan fish allied to Diptcrus, Ctenodus, and Palccdaphus. It is ev
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Keywords: ., bookcentury1800, bookdecade1880, bookpub, booksubjectpaleontology
