TEN EGA EID) \Y/ AL 
SCOLIOSTOMAWAMERICANA sa. occ 2 == siosine wren ee elbee eiete ieee ele eee ae atiseteleta a fae ale ateeetele ete late tnrete 
Figs. 1, la. Two views of a specimen showing the aperture with the columellar lip broken 
away. Natural size. 
1b, c, d. Three shells showing the inturning and expansion of the columellar lip. 
Natural size. 
le. View looking down on the apex of the spire. Natural size. 
PLATYCERAS UNDULATUM | ---. 0oc00 1 ocecen cane mone oan = one oes een en ene aan eens === 
Figs 2, 2a. Dorsal ard side views. Natural size. 
EUOMPHALUS (P.) GAXUS -<- - 6222 coe foc e cen en sane amie = own = wee ene = oem nam ae ee wen 
Fig. 3. View of upper side, enlarged to two diameters. 
PLATYCERAS “THETIFORME «<2 - a -os ome awe em wie lets ws el wlan maint a = ter ol poste Oe one el 
Figs. 4, 4a, b. Posterior, dorsal, and side views of the cast. Natural size. 
PLATYCERAS NODOSUM .----- - 02 2< 2<c- -n0e cone nnee ennn canons ae enn anas eens saa sna =a == === 
Figs. 5, 5a, b. Posterior, dorsal, and side views of the cast of a strongly-marked specimen. 
Natural size. 
ECCULIOMPHALUS DEVONICUS..-- <--< -205 2056 co cen- owen conn ome eons wane ones <n ons === == 
Figs. 6,6 a. Dorsal and ventral views of an adult shell. Natural size. 
LOXONEMA APPROXIMATUM . ~-.-- 22.060 05000 00s cce once cen nne ce enews woe wes serene eeenee ess 
Fig.7. A specimen with the apex imperfect. Natural size. 
ER WOTTTMES Sp sie sears cre ete alee ere ata att ea te el le ell 
Figs. 8, 8a. Two views of the only specimen obtained. Natural size. 
(Bfo9 71-10) ofan 17. N90 Cpe Re ESE EEO CE OD CODES OCCOO TD DN Suer DOCeHsenee DSta eet cccccescsoecesesse cece 
Fig.9. A fragment of shale with numerous tubes lying upon it, enlarged to two diameters. 
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