Figs. 2 
28 and 29 
Figs. 30 to 33 
30 
31 
32 
33 
Figs. 34 to 38 
34 to 36 
38 
Figs. 39 and 40 
Figs. 41 to 44 
41 
44 
Fig. 45 
Figs. 46 to 48 
CONRADELLA DVERT Var: CELDUDOSAs Ui r@u Gino er rnitet lectern ate eee 
Lateral view, mostly in outline only, of a good specimen. Clitambonites bed, 
Trenton group, Cannon Falls, Minnesota. 
Small portions of the sides of the outer whorl, x4 and x8, showing the peculiar 
surface markings. The right side of these figures is anterior. 
CONRADELLA DYE RISE AES pe siete create Oe ote ke ele tedate = otelets ola fevaloteltetarecolou tevateree atersiarers 
Lateral view, in outline, of a nearly complete shell. Richmond group, Butler 
county, Ohio. 
Apertural view of another specimen, x2. This specimen, now incomplete, was 
perhaps a half turn larger than the preceding. It is from the same locality. 
Part of the right side of same, x4. 
Inner whorls of same, 10. 
SAP INGO SHO MAY Sanat 7D AVVO GTO) OS Dn eteteietacoatelaeeedertle pies (xlaislateislels tele l= ebeial eh saiatofe/aiee ve 
Three views of a fine cast of the interior, showing the expanded mouth, the 
open dorsal slit, and obscure indications of the external markings. Stones 
River group, Rockton, Illinois. Geological and Natural History Survey of 
Minnesota, Museum Register No. 7318. 
Dorsal view of a specimen from Beloit, Wisconsin, retaining some of the external 
markings. 
Apertural view of a specimen from the Vanuxemia bed at Minneapolis belonging 
to the Geological Survey collection (Museum Register No. 5544), and doutfully 
referred to s. buelli. In this specimen the apertural portion of the internal 
castas been removed and the remaining radially marked expansion therefore 
represents an impression of the exterior of the shell and not of the interior. 
SATDPING OSTOMA GRICE MON DENSIS MUILIGH Ns 26 tc craccperctole mers iaixiels execs feces eyanisye atele =i «ole, ole aleress 
Two views of a nearly complete cast of the interior, from Richmond, Indiana. 
BUCANIA PUNCTIFRONS EXMMODS....... 2... ccc ccc sce cece ee meee etree sees secees 
Apertural view of a good specimen. The reticulated surface markings are omitted 
except on the umbilical slope on the right side of the figure. Lower part of 
Trenton group, Nashville, Tennessee. 
Small portion of the markings of same, x5. 
Lateral view of another specimen, from the same locality, showing several inter- 
ruptions in the regular growth of the shell. The surface ornamentation was 
drawn on a portion of the outer whorl only. 
Part of dorsum of same, x2.4, showing the slit-band and surface markings to the 
first interruption, the latter being at the top of the figure. 
BUCANEA: STIMU LAMB IEX Ul TCD crasye.e, «ssa ote t EE pe rrocpacie pone ake fenasiaesiarrekebin deisel =r 
(See also plate LXIII.) 
Lateral view of the specimen illustrated on plate Lxur. It is a cast of the 
interior and almost perfect. Imperfect specimens are very liable to confusion 
with the associated Salpingostoma richmondensis figured on this plate. 
BUGANTAS CRPABSAL GUN TLCH Nensercictere ciate vies ts ei ps aetenaeaio es anes Ree ale ot elo lafate ekelalouata etal eto ier states 
Three views of the most complete example seen, showing the thick shell and 
obscure remains of surface markings. Richmond, Indiana. This specimen has 
suffered considerably from maceration. Other, less complete, individuals 
exhibit a rounded dorsal band which, however, does not materially affect the 
almost uniform convexity of the back of the whorls, 
909 
900 
903 
894 
892 
893 
