PLATE VI. BACTRITES? QUADRILINEATUS n. sp. (p. 50). FIGURE 1. Side view of a medium-sized specimen, X 2. 1a. Opposite side showing marginal siphuncle, × 2. 1b. Same, natural size. 2. View of the siphonal side of another fragment of medium size, X 2. 3. A small specimen with long chamber of habitation. 4. A specimen probably belonging to this species, though it shows neither siphuncle nor septa. Possibly it represents only the living chamber. 4a. Portion of the same near the apex, showing peculiar sculpture, × 5. Originals of figures 1-4 from station 2083. BACTRITES? SMITHIANUS n. sp. (p. 53). FIGURE 5. Side view of a medium-sized specimen selected as the type. 6. Portion of the living chamber of a large specimen, showing the sur- Original of figure 6 from station 2083. ORTHOCERAS CANEYANUM n. sp. (p. 45). FIGURE 7. A small free specimen. Original of figure 7 from station 2078. 8. A small, partly eroded specimen. Original of figure 8 from station 2079. ORTHOCERAS CREBRILIRATUM n. sp. (p. 46). FIGURE 9. Side view of the typical specimen. 9a. Portion of the surface, X 5. Original of figure 9 from station 2078. 10. Portion of the surface of another specimen, X 3. ORTHOCERAS WAPANUCKENSE n. sp. (p. 44). FIGURE 11. A small specimen selected as the type. Side view. 12. Side view of a large fragment. FIGURE 13. Originals of figures 11 and 12 from station 2082. ORTHOCERAS INDIANUM n. sp. (p. 47). A decorticated specimen, × 5. 13a. Same, × 2. Original of figure 13 from station 2078. FIGURE 14. Side View of the type specimen, X 3. 14a. Opposite side, X 3. 14b. Same, natural size. Original of figure 14 from station 2091. CYCLOCERAS BALLIANUM n. sp. (p. 47). FIGURE 15. Side view of the type specimen. 15a. End view of same. Original of figure 15 from station 2083. SS |