THE NAUTILUS. 65 
From pink loess at Edgemont, St. Clair Co., north side of 
interurban railway. 
Polygyra profunda pleistocenica Baker. Rare. 
Zonitoides arborea (Say). One specimen. 
From lower part of buff loess at Edgemont, St. Clair Co., 
north side interurban railway. 
Pyramidula shimekiu (Pilsbry). A few very large specimens, 
one individual measuring 7.10 mm. in greatest diameter. 
Succinea ovalis Say. The Succineas are apparently this 
species, although they exhibit some variation, especially in the 
height of the spire. They are not grosvenorii, which occurs in 
the loess deposits of Iowa. 
DESCRIPTION OF NEW VARIETIES. 
Polygyra multilineata altonensis n. var. 
Shell differing from typical multilineata in being larger, the 
whorls more gibbous, the spire more depressed, and the sutures 
between the later whorls more deeply impressed; the last whorl 
begins to rapidly descend on the previous whorl until the upper 
part of the outer lip rests against the periphery, instead of 
above this point, as in multilineata ; the deflection of the upper 
part of the whorl toward the aperture is also more abrupt, and 
forms: a distinct shoulder at this point; the reflected lip is much 
heavier as is also the umbilical callus; the spiral color bands 
and lines are apparently much less numerous than in typical 
multilineata. 
Greatest diameter, 32; height, 19.5; aperture height, 14; 
breadth, 14mm. Holotype. U.I. No. P. 740 A. 
Greatest diameter, 28; height, 15.5; aperture height, 11; 
breadth, 12 mm. Paratype. U.I. No. P. 740 B. 
Horizon: Lower ten feet of pink loess, plant No. 2 Missis- 
sippi Lime and Materials Co., Alton, Madison Co., Illinois. 
This form of mudltilineata is so uniformly different from the 
usual form and size of this species that it seems to require a 
special designation. It probably occurs in other loess deposits. 
The greater size and gibbous-shaped whorls are sufficiently 
characteristic to cause its immediate recognition. This variety 
is apparently not common in these loess deposits, only four 
