978 THE PALEONTOLOGY OF MINNESOTA. 
[Lophospira sumnerensis. 
LopHosPIRA SUMNERENSIS Safford. 
PLATE LXXIII, FIGS. 18—20. 
Murchisonia sumnerensis SAFFORD, 1869, Geol. of Tenn., pl. G., figs. 1, a-f. (Not defined.) 
Hight 18 to 42 mm., usually 25 to 30 mm.; apical angle 60° to 73°, usually 64° 
or 65°. Volutions four or five, the last very large, the upper surface deeply concave, 
the sutural edge slightly thickened but never carinate, the peripheral angle not 
very prominent; beneath it the sides are at first nearly vertical then broadly convex 
to the umbilicus which is entirely closed by the curved inner lip; the latter is thick 
and expanded; aperture unusually high, narrowly rounded below, more broadly 
convex upon the columellar side. Surface markings somewhat irregular, moderately 
distinct though never very sharp, curving strongly backward from both above and 
below to the peripheral band. 
The unusual hight of the last volution and the absence of upper and lower 
carine are the principal peculiarities of this species. The species is probably not 
far removed from EL. elevata and L. peracuta, but all three forms seem to us to be 
easily recognized. In the last the peripheral angle is much more prominent, the 
last volution not nearly so high, and the upper surface much less concave. In the 
second there is a well-marked broad concave band beneath the peripheral angle, 
while the volutions are more exsert, the upper ones exposing more of their sides. 
In L. multigruma (Miller) the apical angle is greater, the volutions not so high, the 
upper surface nearly flat and the peripheral band more prominent. 
Formation and locality—Upper beds of the Trenton group, Nashville, Tennessee, and Mercer and 
Boyle counties in Kentucky. A single cast of the interior from the Fusispira bed at Wykoff, Minnesota, 
probably belongs to this species. 
Collection.—E. O. Ulrich. 
LoPHosPIRA MULTIGRUMA Miller. 
PLATE LXXII, FIGS. 36—39. 
Murchisonia multigruma MILLER, 1878, Jour. Cin. Soc. Nat. Hist., vol. i, p. 104. 
Hight generally from 25 to 35 mm.; greatest width equalling from 75 to 
80-100ths of the hight; apical angle 75° to 80°. Volutions five, uniangular; base 
produced, rounded; umbilicus closed; columellar lip thick and slightly twisted below. 
Surface markings curved strongly backward to the peripheral band, coarse and 
rather irregular on the base of the last whorl, much less distinct on the nearly flat 
upper slope. When perfect the lines of growth are somewhat lamellose. 
This species is closely related to LZ. swmnerensis Safford, but is distinguished by 
a wider apical angle, more prominent peripheral band, plane instead of concave 
upper slopes, and more twisted and thicker columellar lip. Dr. Miller says further 
