GASTROPODA. 979 
Lophospira centralis.] 
that the base of his shell is more produced than in Prof. Safford’s species. ‘his is 
probably a Japsus since the hight of the base, indeed of the whole last volution, 
surely is relatively greater in L. swmnerensis thanin L. multigruma. Another closely 
allied species, it is perhaps even nearer than Prof. Safford’s, is our L. ampla. The 
last, however, usually has a higher spire, but a more reliable and striking difference 
is furnished by the subsutural carina, which is wanting in LD. multigruma. 
Formation and locality.—Occurs in all three of the divisions of the Cincinnati period (Utica, Lor- 
raine and Richmond groups), very rare in the lowest, at Covington, Kentucky, more frequently in the 
middle at Cincinnati, Ohio, and rather commonly in the upper beds at Richmond, Versailles and Madi- 
son, Indiana, Clarksville and Middletown, Ohio, and Maysville, Kentucky. 
Collection.—E. O. Ulrich. 
LopHOSPIRA CENTRALIS, n. sp. (Ulrich.) 
PLATE LXXIII, FIG. 9. 
Hight 20 to 30 mm.; apical angle 60° or 61°. Volutions five or six, all contigu- 
ous, with a concave slope above, somewhat ventricose below the moderately 
prominent, thick, faintly trilineate peripheral band; immediately beneath the band 
a concave space bordered on the lower side by an obtuse carina which grows less 
distinct with age; no upper carina though occasionally a slight thickening may 
occur at the upper edge of the whorls; umbilicus small, abrupt, nearly covered by 
the inner lip. Aperture but little produced below, obliquely rounded-quadrate in 
outline. Surface markings somewhat irregular and rather strong, especially 
beneath the lower carina; above the latter they turn almost sharply backward to 
the peripheral band; and on the upper side the retral curve is very decided. 
Closely related to M. perangulata Hall, but is a larger shell, has a wider apical 
angle, and more rapidly enlarging volutions. The species is regarded as intimately 
connected with L. oweni and L. ampla. 
Formation and locality—Lowest division (Central limestone) of the Stones River group, Murfrees- 
boro, Tennessee. 
Collection.—E. O. Ulrich. (7 specimens.) 
LoPHOSPIRA CONRADANA, 2. Sp. 
PLATE LXXII, FIGS. 29-32. 
Murchisonia ventricosa, WHITFIELD, 1882, Geol. of Wis., vol. iv, p. 218, pl. v, fig. 18. 
Hight 21 to 31 mm.; greatest width about 7-l0ths of the hight; apical angle 
60° to 64°; volutions about six. 
Of this species besides a single imperfect mold of the exterior we have seen 
only casts of the interior. In the former the upper whorls are rounded, but on the 
last two the periphery increases gradually in prominence until near the aperture it 
