. Report of the Geological exploration of the fortieth parallel . view of a large specimen accidentally compressed. 3 a. Ventral view of same. 3 h. Dorsal view of same. Fig. 4. Athyris? persinuata 81 4. An antero-ventral view, showing the profound sinus of the front. 4 a. A dorsal view of same; a part of the shell being removed so as to show the muscular scars. 4 1). Side view of same, with beak and contiguous parts broken away. Fig. 5. GONIATITES GONIOLOBUS 98 5. A profile view of an internal cast, with the body-chamber broken away. 5 a. Side view of same. 5 6. Diagram of lobes and sinuses of
. Report of the Geological exploration of the fortieth parallel . view of a large specimen accidentally compressed. 3 a. Ventral view of same. 3 h. Dorsal view of same. Fig. 4. Athyris? persinuata 81 4. An antero-ventral view, showing the profound sinus of the front. 4 a. A dorsal view of same; a part of the shell being removed so as to show the muscular scars. 4 1). Side view of same, with beak and contiguous parts broken away. Fig. 5. GONIATITES GONIOLOBUS 98 5. A profile view of an internal cast, with the body-chamber broken away. 5 a. Side view of same. 5 6. Diagram of lobes and sinuses of one of the septa, natural size. Fig. 6. Spirifer OPiMus?. A ventral view 88 Fig. 7. AVICULOPECTEN Utahensis 95 7. A left ? valve, natural size. 7 a. A portion of the surface of same, magnified to show the minute, crowded, concentric 6. A mould of a larger individual in the c. A mould of a small right valve of apparently the d. A cast of another specimen of same, differing a little in form. LIS Carboraferous Plate H■^•^Ellicr. Jita 1. MoDIOMOIiPriA ? OVATA 103 1. Eight valve; tbe specimen being a cast of the A profile to show the convexity of same. Fig. 2. MoDiOMOEPHA? LATA. An external cast of a left valvc 103 Fig. 3. DisciNA (undt. sp.) 98 3. Under valve. 3 a. Same, enlarged two diameters, and showing more nearly the proper proportions. Fig. 4. Spii^ra Whitneyi , 102 4. A left valve of a small specimen. 4 a. An outline to show the convexity of &. A right valve of a larger specimen, 4 c. A large individual apparently of the same species, Fig. 5. Halobia Lomivieli. A slab of rock, with several imperfect valves, all being casts of the exterior 100 Fig. 6. Arcestes Gabbi „.. , 121 (). A cast of the interior, side a. Profile view of same. 6 i. An outline showing the lobes and sinuses of one of the septa from the umbilicus to the siphonal lobe; taken from Mr. Gabbs figure in the Califo
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Keywords: ., booksubjectbotany, booksubjectgeology, booksubjectpaleontology
