. North American geology and palaeontology for the use of amateurs, students, and scientists [microform]. Paleontology; Paleontology; Geology; Paléontologie; Paléontologie; Géologie. Fig. 1170.—Ptyctodus calceoluo. 81de view with fulcra! scales; anal fin long, nearly opposite tlorsal; ventrals small; pecto- rals small, falcate; caudal large, notched; upper jaw longerthan thelower; endo- skeleton strong; scales small, rhom- boidal. Type P. humboldti. Not defi- nitely known from America. iculellaluii, Newberiy, 1857, Prcc. Acad. Nat. Sci., vol. 8, p. 98, Coal Meas. Too poorly defined to warrant
. North American geology and palaeontology for the use of amateurs, students, and scientists [microform]. Paleontology; Paleontology; Geology; Paléontologie; Paléontologie; Géologie. Fig. 1170.—Ptyctodus calceoluo. 81de view with fulcra! scales; anal fin long, nearly opposite tlorsal; ventrals small; pecto- rals small, falcate; caudal large, notched; upper jaw longerthan thelower; endo- skeleton strong; scales small, rhom- boidal. Type P. humboldti. Not defi- nitely known from America. iculellaluii, Newberiy, 1857, Prcc. Acad. Nat. Sci., vol. 8, p. 98, Coal Meas. Too poorly defined to warrant Pia. 1171.—Pygopterts mandlbulnrls. Outiiide and under t>urfuce of scale mugiiiHed. RiiADiuicnTiiYs, Traquair, 1877, Quar. Jour. Geo. Soc. Lond., vol. 33, p. 548. [Ety. rhadinos, slender; ichthys, fish.] Body slender; jaws with a row of incurved laniaries, outside of which there are smaller teeth ; principal rays of pectoral fin as in Pygo|)terHs; dorsal far back, nearly opposite the anal. Type K. ornatissimus. Fio. 1172.—Rhadlniclithys albertl. aiberti^ Jackson, 1851, (Palteoniscus al- bertl,) Rep. on the Albert Coalmine, New Brunswick, Coal Meas. cairnsi, Jackson, 1851, (Paleeoniscus cairnsi,) Kep. on Albert Coal-mine, New Brunswick, Coal Meas. modulus, Dawson, 1877, (Paleeoniscus modulus,) Can. Nat. and Quar. Jour. Sci., vol. 8, Carboniferous. RnizoDus, Owen, 1840, Odontography. [Ety. rhiza, a root; o<Ioh», tooth.] Jaws massive, bearing large, compressed, double-edged teeth, with suicated bases in each dental bone, and numerous smaller ones; scales large, rotundato- quadrate, thin, iuner surface concentric- ally lined; outer surface tubercu- late. Type U. hib- berti. anguatus, Newberry, 1857, Proc. Acad. Nat. Sci. Phil., vol. 8, p. 00, Coal Meas. Poorly defined, hardingi, Dawson, 1868, Acad. Geol., p. 254, Subcarbon- iferous. incurvus, Newberry, 1857, Proc. Acad. Nat. Sci., vol. 8, p. 00, Coal Meas. Poorly Please note that these images
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