. The Geology of Minnesota . e also plate lxvii.)Vertical section showing transverse sections of all the whorls and portions offormer apertural expansions about two of the inner turns. Fig. 67 Conradella qrandis Ulrich 908 Transverse section of the last whorl of specimen figured on plate LXVII. Fig. 68 Helicotoma UMBiLicATA U. and S 1034 (See also plate lxxiv.) Transverse section of the whorls of a specimen from the Stones River group atDixon, Illinois. Fig. 69 Helicotoma verticalls Ulrich 1035 Transverse section of the last whorl of the specimen figured on plate LXXIV. Fig. 70 EccYLiOPTBRUS B
. The Geology of Minnesota . e also plate lxvii.)Vertical section showing transverse sections of all the whorls and portions offormer apertural expansions about two of the inner turns. Fig. 67 Conradella qrandis Ulrich 908 Transverse section of the last whorl of specimen figured on plate LXVII. Fig. 68 Helicotoma UMBiLicATA U. and S 1034 (See also plate lxxiv.) Transverse section of the whorls of a specimen from the Stones River group atDixon, Illinois. Fig. 69 Helicotoma verticalls Ulrich 1035 Transverse section of the last whorl of the specimen figured on plate LXXIV. Fig. 70 EccYLiOPTBRUS BELOiTENSis U. and S 1032 (See also plate lxxiv.) Transverse section of 71 and 72 Eccyliopterus volutatus Whitfield sp 1031 (See also plate lxxiv.) Transverse section of the last whorl of two specimens, one with the shell, theother an internal cast only. Fig. 73 Eccyliopterus TRiANQULUs Whitfield sp 1031 (See also plate Lxxiv.) Transverse section of the outer whorl of a cast. Vol. III. ((Sastp:registered??registered:da,] Plate PLATE LXIII. 1 to 14 Protowarthia CANCELLATA Hall sp 872 1 and 2 Two views of a large east of the interior, retaining a little of the shell in theumbilicus and having several strong wrinkles of growth near the bed of the Black River group, West St. Paul, Apertural view of a shell having the mouth less expanded than usual. Ctenodontabed, Goodhue county, Minnesota. 4 to 6 Three views of an entire shell, representing an average for the species in size andproportions. Ctenodfinta bed, Chatfield, Minnesota. 7 and 8 Two views of a rather small cast of the interior from the Clitambonites bed ofthe Trenton group in Goodhue county. This is a fair sample of the species asit occurs in this Surface of a specimen from the Utica group at Covington, Kentucky. and certain lights the longitudinal lines look more like a series of minute gran-ules. The right side of the figure corresponds very nea
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Keywords: ., bookcentury1800, bookdecade1890, bookidgeologyofmin, bookyear1897
