I'l.VT! I.\\\ll 



PAOB. 



Figs, land 2 TKYin.unrii MoOKDTfM D. and 8. 



Two views, dorsal and profile, of toe specimen described. 



I. 3 and 4 A I.LA PKKOVAU8 Whltfleld sp. "30 



Dorsal and profile views of a cast of the Interior from Minneapolis (After Sar- 

 deson. who called It Metoptoma aplanala.) 



Flgi. Band 6 Amur- \ I'lrlrh M6 



Two view* of a out, apparently of the exterior, from Mlddletown, Ohio. 



7 to STBNBI.LA v v U. and S 8 



Three views. In out lino and restored at the apex, of the specimen described. 



Fig. in SCKNKI.I.A OBTUSA Sardeson p 841 



Dorul rlw of a emit of th>- Interior, from Minneapolis. (After Sardeson, who 

 ailed It Gmdtoptllit obtma.) 



Fig*. 11 to 15 STKNOTIUCA KX8KRTA Sardeson sp Ml 



11 ami 12 Two views of a small peclmen presumably of this species; Minneapolis. Geolog- 



Ical and Natural HUtory Surrey of Minnesota, Museum Register No. 715. 

 13 Outline vltw of a large specimen from Belolt, Wisconsin, belonging to the collec- 



r the University of Wisconsin. 



14 and 15 Duplex of Sardeaoo's original figures of his TryblUUttm overturn, founded upon a 

 specimen from the " Bluo limestone" at Minneapolis. 



Figs. 16 to 20 SALFiNoorroMA SCULPTIUH D. and S 902 



16 Lateral view of a partial cast of the Interior from which the greater part of the 

 apertural expansion has been broken away; Goodhue county, Minnesota. 



17 and 18 Lateral and dorsal views of a more complete cast of the -xterlor, showing the 

 greater part of the expanded aperture, the dorsal silt and surface sculpture; 

 from Goodhue county. Geological and Natural History Survey of Minnesota, 



Museum Register No. 746S. 



IB Portion of same, .5, showing slit-band and sculpture. 



20 Transverse section of Inner half of last whorl of a cast of the interior from Fill- 

 more county, Minnesota. 



Figs. 21 and 22 SALPINOOOTOMA IMBBICATA U. and S 002 



Two views of the specimen described. 



Figs. 23 to 25 OXTDIBCUS SUBACUTUS, n. sp. (Ulrich.). 913 



(tta* tUo plat* LXII. no. St-SS.) 



S3 Lateral view In outline, each volution embracing about one-half of the preceding 



one. 



24 Ventral view of same, x2, to correct fig. 62 on pi. LX 1 1 . 

 26 Side view of a similar specimen, x2, showing the slender inner whorls. Both 



specimens are from Danville, Kentucky. 



Fig*. 26 to 28 OXTDISCUS CRMTATUS Safford sp.. ... : 914 



26 Lateral view of the smallest of four specimens; Jackson county, Tennessee. 



Collection of Prof. J. M Safford. 



27 Similar view of the largest specimen; Llndftlcy'a Hill, Tennessee. In this exam- 



ple the outer part of the last whorl Is free from the dorsal keel of the preceding 

 whorl. 



28 Portion of the dorsal keel of a large specimen, broken like fig. 27, showing the 



posterior extremity of the long slit; Nashville, Tennessee. 



Figs. 29 to 31 C<UX-AULU8 NKULJCCTCS U. and S 1020 



20 and 30 Literal and basal views of the specimen described; near Cannon Falls, Minnesota. 

 31 Upper two whorls of same, x2.5, to show the rounded terminus more clearly. 



Figs. 32 to 34 HKI.K OTOMA ORANOSA t" : I03S 



i -r aide of a small specimen, x3, from High Bridge, Kentucky. 



33 Profile view of same, x3, showing the surface granulation more clearly than In 



flg.32. 



34 Upper side of same, natural size. 



Figs. 35 to 38 LioepiKA AHRCITA U. and S 



36 Under side of an average example. Murfreeaboro, Tennessee. 

 M Upper side of another specimen. 



37 Profile views, x2, the lower line giving the form for UM original of fig. 35, the 



line above it for that of fig. 36. The spire Is sometimes more depressed. Th- 

 line on the right of the figure Is Intended to show the contour of the " band " 

 and peripberlal portion of the whorls. 



M Oblique view ot the umbiltcut, x2, showing the crescent-shaped reflexion of the 

 Inner lip. 



