238 NORTH AMERICAN MESOZOIC INVERTEBRATA. [BULL. 102. Plagiostoma Continued. truncata n. 8. Trask. (1856.) Proc. Gal. Acad. Nat. Sci., vol. 1, 1st ed.,p. 86, pi. 3, fig. 3. San Francisco, 1854-1857. J. B. Trask. Formation: Cretaceous. Location : San Pedro, Cal. sp. undet. Morton. (1830.) Am. Jour. Sci., 1st ser., vol. 18, p. 245. Haven, 1830. S. G. Morton. Formation: Cretaceous. New Planorbella (subgen. Hald.) Meek. (1876.) Rep. TJ. S. Geol. Sur. Terr.,vol.9,p.536. Wash., 1876. F. B. Meek. Planorbis (Miiller) M. & H. (1865.) Paleont. Up. Missouri, Smithson. Cont. Kuowl., vol. 14, No. 172, pp. 106, 107. Wash., 1865. Meek & Hayden. (Mtiller typical) Meek. (1876.) Hep. U. S. Geol. Sur. Terr., vol. 9, p. 535. Wash., 1876. F. B. Meek. amplexus n. s. M. & H. (1857.) Proc. Acad. Nat. Sci., Phila., for 1857, pp. 135, 136. Phila., 1858. Meek & Hayden. Formation : Cretaceous. Location: Mouth of Judith river, Nebr. convolutus n. s. M. & H. (1856.) Proc. Acad. Nat.Sci., Phila., vol. 8, forl856, p. 120. Phila., 1857. Meek & Haydeu. Formation: Tertiary [Cretaceous]. Location: Little Horn river. convolutus (M. & H. ) Meek. (1876.) Rep. TJ. S. Geol. Sur. Terr., vol. 9, pp. 536, 537, pi. 42, figs. 12a, 6. Wash., 1876. F. B. Meek- Formation : Cretaceous. Location : Little Horn and Powder rivers, Mont. convolutus (M.&H.) White. (1883.) Twelfth Ann. Rep. U. S. Geol. and Geogr. Sur. Terr., pt. 1, p. 83. Wash., 1883. C. A. White. Formation: Cretaceous. Location : Upper Missouri river region. convolutus (M. &H.) White. (1883.) Third Ann. Rep. U. S. Geol. Sur., p. 41, pi. 27, fig. 16. Wash., 1883. C. A. White. Formation : Cretaceous. Location : Upper Missouri river region. convolutus var. Meek. (1876.) Rep. U. S. Geol. Sur. Terr., vol. 9, p. 538, pi. 42, figs, lla-e. Wash., 1876. F. B. Meek. Formation: Cretaceous. Location : Little Horn and Powder rivers, Mont. fragilis n. s. M. & H. (1857.) Proc. Acad. Nat. Sci., Phila., for 1857, p. 136. Phila., 1858. Meek.& Hayden. Formation : Cretaceous. Location : Fort Berthold, on the Missouri river, Nebr. Planorbis Continued. paucivolvis n. e. Whiteaves. (1885.) Geol. and Nat. Hist. Sur. Can., Cont. Can. Paleont,, vol. 1, pt. 1, p. .71, pi. 10, fig. 5. Montreal, 1885. J. F. Whiteaves. Formation: Cretaceous. Location : Belly river, near its junction with the Bow river; South Saskatchewan, six miles below the mouth of Bow river, Canada. subumbilicatus n. s. (M. & H.) (1856.) Proc. Acad. Nat. Sci., Phila,, vol. 8, for 1856, p. 120. Phila., 1857. Meek & Hayden. Formation: Tertiary [Cretaceous], Location: Three miles below Fort Union. tenuivolvis n. s. M. & H. (1857.) Proc. Acad. Nat. Sci., Phila., for 1857, p. 135. Phila., 1858. Meek & Hayden. Formation: Cretaceous. Location: Mouth of Judith river, Nebr. veternus (M. & H.) (1865.) Paleont. Up. Missouri, Smithson. Cont. Kuowl., vol. 14, No. 172, p. 107, pi. 4, figs. l,la, b. Wash., 1865. Meek & Hayden. Formation: Jurassic? [Jurassic]. Location: Southwest base of the Black hills. veternus (M. & H.) Whiteaves. (1878.) Geol. Sur. Can., Rep. Prog., for 1876-1877, p. 156. Montreal, 1878. J. F. Whiteaves. Formation: Jurassic. 'Location: Iltasyauco river, British Columbia. veternus (M. & H.) Whiteaves. (1878.) Canadian Naturalist, vol. 8, n. ser., No. 7, pp. 406, 407. Montreal, 1878. J. F. Whiteaves. Formation: Jurassic. Location: Tltasyouco river. veternus (M. & H.) White. (1883.) Third Ann. Rep. U. S. Geol. Sur., p. 40, pi. 3, flg. 6. Wash., 1883. C. A. White. Formation: Jurassic. Location: Vicinity of the Black hills. veternus (M. & H. ?) White. (1886.) Bull. U. S. Geol. Sur., No. 29, p. 21, pi. 4, figs. 20, 21. Wash., 1886. C. A. White. Formation: Jurassic. Location: Eight miles north of Canyon city, Colo. (BathyomphalusJ amplexus (M. & H.)Meek. (1876.) Rep. U. S. Geol. Sur. Terr., vol. 9, p. 539, pi. 42, figs. 16
BOYLE.] NORTH AMERICAN MESOZOIC INVERTEBRATA. 239 Planorbis Continued. CBathyomphalus) amplexus (M. & H.) White. (1883.) Third Ann. Rep. U. S. Geol. Sur., p. 41, pi. 27, figs. 19, 20. Wash., 1883. C. A. White. Formation: Cretaceous. Location: Judith river beds. (Bathyomphalusj kanabensis 11. s. White. . (1876.) Rep. Geol. Uinta Mts., p. 119. Wash., 1876. C. A. White. Formation: Cretaceous. Location: Upper Kanab, Utah. (BathyomphalusJ kanabensis White. (1883.) Third Ann. Rep. U. S. Geol. Sur., p. 41, pi. 27, figs. 21,23. Wash., 18S3. C. A. White. Formation: Cretaceous. Location: Southern Utah. (Gyraulus) militaris n. s. White (1880.) Proc. U. S. Nat. Mm. vol. 3, pp. 159, ICO, Wash., 1880, Smithson. Misc. Coll., vol. 22. Wash., 1882. C. A. White. Formation: Cretaceous. Location: Head of Soldier's fork, Utah. r (Bathyomphalus) planoconvexus (M. &H.)Meek. (1876.) Rep. U. S. Geol. Sur. Terr., vol. 9,'pp. 638, 539, pi. 44, figs. 9