The American Journal of Science, Том 204J.D. & E.S. Dana, 1922 |
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Стр. 22
... has a long skull and less than half of its length is preserved . This form can- not go generically with the older animal described by Marsh 22 F. von Huene - Order Thecodontia . Triassic Reptilian Order Thecodontia, by VON HUENE,
... has a long skull and less than half of its length is preserved . This form can- not go generically with the older animal described by Marsh 22 F. von Huene - Order Thecodontia . Triassic Reptilian Order Thecodontia, by VON HUENE,
Стр. 23
... length of the base of the skull , relative length of the snout , position of the narial openings , condition of the supratemporal opening , and palate . The posterior part of the skull ( beginning in front with the anterior margin of ...
... length of the base of the skull , relative length of the snout , position of the narial openings , condition of the supratemporal opening , and palate . The posterior part of the skull ( beginning in front with the anterior margin of ...
Стр. 32
... Length of frontals on median suture mm . 77 41 62 27 62 40 Expanse of occipital condyles " The remains of this species at present known are from the Eocene of Wyoming . " So far as one may judge from the teeth , the species here ...
... Length of frontals on median suture mm . 77 41 62 27 62 40 Expanse of occipital condyles " The remains of this species at present known are from the Eocene of Wyoming . " So far as one may judge from the teeth , the species here ...
Стр. 36
... length of 25 mm . by the distortion of the skull . The chief distinguishing features are found in the unusual premolars . 2 . Of the teeth of the cheek series the second molar is largest ; it approaches in size that of Hyrachyus ...
... length of 25 mm . by the distortion of the skull . The chief distinguishing features are found in the unusual premolars . 2 . Of the teeth of the cheek series the second molar is largest ; it approaches in size that of Hyrachyus ...
Стр. 37
... length Molar series , length P1 , width P4 , length M2 , width ... mm . 111 64.5 21.7 16.5 26.3 SUMMARY . Two Eocene specimens are figured and described here which are unusual in having on the nasals slight thicken- ings , or centers of ...
... length Molar series , length P1 , width P4 , length M2 , width ... mm . 111 64.5 21.7 16.5 26.3 SUMMARY . Two Eocene specimens are figured and described here which are unusual in having on the nasals slight thicken- ings , or centers of ...
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ammonium chloride appears aragonite atoms bands barium basalt Bayer's beds biotite bowlders brachiopods calcite canine cent chemical chloride clays colloidal color composition compound cone cone-in-cone Cope crystalline crystals deposits described determined Devonian diameter Dinictis Eocene evidence fanglomerates fault plane fauna feet feldspar formation fossils gabbro genus Geological Glass gneiss granite graptolites Holotype Hyrachyus igneous indices John Day JOUR lake Laue photographs layer length leucite limestone liquid lower Marsh mass material measurements melting method miles minerals Miocene mixture molar Nimravus Nimravus debilis occur orthoclase oxide Payette platycopis Pogonodon Pogonodon davisi posterior premolars present probably quartz lode quartzite Reagan refraction region ridge rocks salt sandstone SCI.-FIFTH SERIES sediments serrulidens shales silicates skull solution space groups sparagmite species specimen stibnite strontium structure surface symmetry temperature thickness tion Triassic trilobites U. S. Geol upper zone