GASTROPODA. 977 
Lophospira elevata.] 
(Safford) the last volution is relatively much higher and the peripheral angle not 
nearly so prominent. In general the species may be said to occupy an intermediate 
position between L. elevata and L. multigruma Miller and Dyer. 
Formation and locality.-The type specimen is from the Glade limestone of the Stones River group 
at Lebanon, Tennessee. We have several imperfect specimens from the Ctenodonta bed of the Black 
River group at St. Paul, Minnesota, which may belong to the same species. 
Collection.—E. O. Ulrich. 
LoPHOSPIRA ELEVATA, %. Sp. 
PLATE LXXIII, FIGS. 11-14. 
Hight 30 to 50 mm.; apical angle 52° to 54°. Volutions about six, contiguous 
but descending rapidly, an unusually large proportion of each exposed in the spire; 
peripheral carina moderately prominent, thick, situated about midway between the 
top and bottom of the whorl; beneath it a wide, slightly concave space, not very 
distinctly defined below by the obtuse lower angulation beyond which the surface 
turns rapidly inward to the small umbilicus; upper slope slightly concave to the 
suture, apparently never with a carina. Mouth very moderately drawn out below, 
the inner lip more or less curved and turned outward instead of being vertical as in 
most of the related species. Lines of growth rather obscure, curving strongly 
backwards to the peripheral band. 
Very much like McCoy’s Murchisonia gyrogonia, but if his figures are reliable 
then the two species must be quite distinct since the very slight retral curve in the 
lines of growth as shown in McCoy’s illustration proves that his species belongs to 
the Bicincta section of Lophospira, while our elevata is an undoubted member of the 
Perangulata section. Compared with American species we find that the mouth is 
less produced below and, although the whorls are the same in number, the size of 
the shell much greater than in L. perangulata. The Tennessee species, L. centralis, 
is perhaps the nearest, yet we did not find much trouble in separating them. The 
apical angle is wider in that shell, the under side of the whorls more ventricose, the 
suture lines less oblique and the concave spaces over them narrower. 
Formation and locality.—Five specimens from the Fusispira bed of the Trenton group at Decorah, 
Towa, and Kenyon and Holden P. O., in Goodhue county, Minnesota. Several specimens from the upper 
part of the Trenton in Mercer county, Kentucky, are doubtfully referred here. 
Collections.—Geological and Natural History Survey of Minnesota; E. O. Ulrich, 
Museum Register, No. 7370. 
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