PLATE LXXI. 
Migs’ dand| (2) LOPHOSPIR'A AUGUSLIENAS Bim eS Spices stereteierciereieieielsteicleie/store sraiele stefetoiaiele eens eee ieee 987 
Two figures of a rather large cast of the interior of the Minnesota form which we 
refer to this species. Fig. 2 shows the filling of the umbilical perforation. 
Maclurea bed of the Trenton group, Stewartsville, Minnesota. 
Figs. 3and 4 LoPHOSPIRA AUQGUSTINA Var. MINNESOTENSIS U. and S.............cceecseeecceees 988 
3 A large specimen of this variety, from the same locality as the preceding. The 
outline restoration of the aperture may not be entirely correct. 
4 A smaller specimen, also a cast of the interior; from the same locality. The 
smallest two whorls are restored from another specimen. 
igsts Di tOw ie eELOR MO TORCAY() SMA OR) ELUM ES YD fre arercyete pe cto rst esictclefevoleteveyerotencinlelaicela)=ielevetereieleretelsle)e/cleie i jstaracte 1018 
5 The last four whorls of a cast of the interior that we believe to belong to this 
species. Trenton group, Pike county, Missouri. Geological and Natural His- 
tory Survey of Minnesota, Museum Register No. 7842. 
Outline of outer lip of same. showing the broad sinus or notch. 
Last two whorls of a specimen retaining part of the shell, but so ill preserved 
that not a trace of surface markings remains. The specimen is important, 
however, because it shows the external character of the sutures. Maclurea bed 
of the Trenton group, Olmsted county, Minn. Geological and Natural History 
Survey of Minnesota, Museum Register No. 7485. 
“1D 
