GASTROPODA. 1079 
Fusispira angusta.] 
FUSISPIRA ANGUSTA, ”. sp., and var. SUBPLANA, Nn. var. 
PLATE LXXXI, FIGS. 28—82. 
This species is represented in the collections before us by fourteen or more casts of the interior. 
These are slender, with an apical angle of 18° to 20°, and consist of four or five volutions, the perfect shell 
probably having had several more at the apex. The whorls are unusually high, very slightly convex— 
almost flat—and separated by very oblique, deep and open sutures, indicating a rather thick shell. The 
aperture is narrow, somewhat lenticular in outline, and about three times as long as wide. The largest 
specimens indicate a total hight of about 100 mm. 
Figure 32 represents one of two specimens that may be distinguished at least as a good variety, for 
which we propose the name subplana. It differs from the typical form of the species in having an apical 
angle of 25°, instead of 20° or less, and less distinct sutures, indicating a thinner shell. 
Formation and locality.x—Fragments of this species are not uncommon in the Clitambonites bed of 
the Trenton group, at various localities in Goodhue county, and more rarely in the lower part of the 
Fusispira bed near Cannon Falls and Fountain, Minnesota. It occurs also in the lower half of the same 
group of rocks near Burgin, Kentucky. 
Collections.—Geological and Natural History Survey of Minnesota; BH. O. Ulrich; W. H. Scofield. 
Museum Register, Nos. 218, 7378, 7423, 8394. 
Family LOXONEMATID A. 
Genus MEEKOSPIRA, n. gen. (Ulrich.) 
Shell elongate conical or somewhat fusiform, consisting of smooth, nearly 
flat or more distinctly convex, and but slightly overlapping, whorls; aperture subovate, 
occasionally somewhat effuse below; inner lip slightly reflected, simple, without 
folds winding about the columella so as to pass out of sight opposite the middle of 
the aperture, lines of growth nearly or quite straight and vertical. Type, Hulima? 
(later Polyphemopsis) peracuta Meek and Worthen, Coal Measures, Illinois. Probably 
congeneric species have been referred to Melania, Hulima, Polyphemopsis, Macrochilina 
and Subulites. 
We regard this genus as occupying an intermediate position between Loxonema, 
Phillips, and Soleniscus, Meek and Worthen (Macrochilus Phillips), two genera which 
in some of their extreme forms border closely upon the ground of the proposed 
genus. In another direction Meekospira approaches Sulimorpha, Whitfield, while 
the new genus on the whole reminds one considerably of the Eulimide of which 
some of its species may be the ancestors. 
Meekospira will probably include beside the type species also Polyphemopsis 
nitidula and P. inornata of Meek and Worthen, of the Coal Measures, P. lowisville 
Hall and Whitfield, and Melania antiqua Goldfuss, Devonian, Macrochilina bulima, 
M. cancellata and M. fenestrata of Lindstrém and Subulites (Polyphemopsis) planilateralis 
Feerste, Upper Silurian, and the Lower Silurian species about to be described, 
M. subconica. 
