Report of the United States Geological Survey of the territories . a bisulcata 101 4, a. A right-side view of the type-specimen, magnified to two diameters. 4, b. A dorsal view of the same. FlG. ?. )1 A VENTKICOSA 11-! 5,a. Eight-side view, natural size, copied from the figure of the type-specimen. 5, b. Same, magnified. Fig. (i. Nemodon sulcatinus 82 6, a. An internal cast, natural size. 0, b. Same, magnified. (Mesial sulcus not deep enough.)Fig. 7. Nuculana ? equilatekalls 106 7, a. Right-side view of the type-specimen, consisting of an internal cast, magnified two diam- ,b. Dors
Report of the United States Geological Survey of the territories . a bisulcata 101 4, a. A right-side view of the type-specimen, magnified to two diameters. 4, b. A dorsal view of the same. FlG. ?. )1 A VENTKICOSA 11-! 5,a. Eight-side view, natural size, copied from the figure of the type-specimen. 5, b. Same, magnified. Fig. (i. Nemodon sulcatinus 82 6, a. An internal cast, natural size. 0, b. Same, magnified. (Mesial sulcus not deep enough.)Fig. 7. Nuculana ? equilatekalls 106 7, a. Right-side view of the type-specimen, consisting of an internal cast, magnified two diam- ,b. Dorsal view of same. Fig. 8. Nucula planimarginata IM -.((. A right view of the type specimen, consisting of an imperfect east, retaining a pail of the ,6. Dorsal view of same. Fig .. Nil subnasuta 105 A left-side view, natural size. Fig. 10. Nucula obsoletistriata 100 10,. i (ntsidc view of type-specimeu, consisting of an imperfecl left ,J. Inside and hinge view, of same. li,^.L)iooliHucal§ur,ua tj ? i I i ivl Ilinr (.roup I r i.,vr,K ! PLATE 16. Page. Fig 1. Pteria linguiformis 32 1, a. A right-side view of an internal cast, with the projecting extremity of t lit- posterior wing broken ,6. A slill more imperfect cast of a left , c. A light-side view of a very small, young , rf. A left-side view of a larger example. Fig. 2. Pteria Haydeni 33 2,o. A left-side view, natural size, copied from the original figure of the type-specimen (prob-ably a young shell |.2,6. The same, somewhat magnified. Fig. 3. Pteria (Oxytoma) Nebrascana 34 3, a. A left-side view of a medium-sized , b. The same, of a large, imperfect specimen. 3, c. Surface-markings, magnified. Fig. 4. AnomiaI subtrigonalis 22 4, a. Au external view of the type-specimen, consisting of a east of the upper valve. 4, 6. A different view of parts of both valves, perhaps of the same shell. Fig. 5. SyNCYCLonema rigida 27 5, a. A medium-sized left valve. 5, b. An internal ea
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Keywords: ., bookcentury1800, bookdecade1870, bookpublisherwashi, bookyear1876
