Report of the United States Geological Survey of the territories . rfect specimen. 15, c. A dorsal view ot the specimen, represented by lig. 15, , d. Surface-stria, somewhat magnified. 1>, e. Right side of a larger, somewhat more oval, lti. Tellina? Chevennensis. (See Appendix.)A left-side view of the type-specimen. Fig. 17. Pteria ( Pseudoptera) fibrosa 3ti 17, it. An internal cast of a right valve. (Type of species.) 17, 6. An outline of the, two valves united, as made out from opposite, detached valves. 17, c. An imperfect left valve. 17, d. An imperfect right valve, wit
Report of the United States Geological Survey of the territories . rfect specimen. 15, c. A dorsal view ot the specimen, represented by lig. 15, , d. Surface-stria, somewhat magnified. 1>, e. Right side of a larger, somewhat more oval, lti. Tellina? Chevennensis. (See Appendix.)A left-side view of the type-specimen. Fig. 17. Pteria ( Pseudoptera) fibrosa 3ti 17, it. An internal cast of a right valve. (Type of species.) 17, 6. An outline of the, two valves united, as made out from opposite, detached valves. 17, c. An imperfect left valve. 17, d. An imperfect right valve, with somewhat different costai. Fig. is. Mactra graciijs 209 1S,«. Left-side view of type-specimen. 18, 6. A dorsal view, in outline. Fig. 19. Teredo selluormis 262 19, a. A right-side view, natural size, of , b. Same, magnified, to show the surface-markings. 19. c. Internal cast, magnified, to show the deep posterior .sulcus left by an internal ,d. Burrows, supposed to have been made by this species. 17 2 l i ui Pierre Group.) II,,VII. ? PLATE 18. Figs. 1 and 2. ? pahva 29(5 l,<r. Upper sido of ;iu internal cast, natural size, of , b. A lateral view of , c. Interior of the shell of Internal cast, magnified, to show the small, horseshoe-shaped, muscular scar. Fig. 3. AcMiEA occidentals 293 3,a. An internal cast, natural size, showing the muscular scar anil obscure radiating lines ofthe interior. 3, 6. A side view of same. 3 c. An upper-side view of internal cast, magnified, to show more clearly the muscular scar andother 4. alveolus 292 4, a. An internal cast, with some remainiug portions of the shell around the margins and the peculiar muscular scar seen nearly inclosing the apex (type-specimen). 4, b. A side view of same. Fig. 5. Anisomyon fatklliformis 290 5, a. A side view of a testiferous specimen, showing the immediate minute apes abruptly curved , b. An anterior view of sa
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Keywords: ., bookcentury1800, bookdecade1870, bookpublisherwashi, bookyear1876
