450 THE CHICAGO ACADEMY OF SCIENCES. 
lightly appressed to the parietal wall, where it shows as a very thin 
wash of callus; the anterior part of the lip is reflected over the um- 
bilicus, leaving a very small chink, axis slightly twisted, forming a more 
or less distinct, ascending plait. 
Length. Width. Aperture length. Width. 
12.00 8.50 8.00 5.00 mill. Type. 
11.50 7.50 7.25 AO M2 e 
12.00 7.75 7.00 A00) ic 
11.00 6.75 6.25 Sue : 
15.25 9.25 10.50 oe Olea oo 
11.00 6.75 6.50 BH. os < 
15.10 10.00 10.00 5.00 “ Spokane Falls. 
14.00 8.50 8.80 ASS Of stan # e 
Types: Chicago Academy of Sciences, five specimens, No. 23720; 
cotypes, Academy of Natural Science, Philadelphia; Coll. A. A. Hink- 
ley. 
Tyre Locauiry: North fork Snake River, East Idaho. 
ANIMAL, JAW, RADULA and GENITALIA: Not examined. 
Rance: Idaho and Oregon. Columbia River drainage (Co- 
lumbian region). 
RECORDS. 
IpAHo: North fork Snake River, Fremont Co. (H. O. Hinkley). 
Orecon: Snake (Lewis) River (Haldeman). 
GEOLOGICAL DistripuTion: Unknown. 
Ecotocy: Not recorded. 
Remarks: Hinkleyi is related to both binneyi and apicina, but 
differs from both in being much thinner, more tumid, the inner lip is 
narrower, the umbilical chink smaller and the axis more twisted. The 
whole shell is more fusiform in outline. Hinkleyi varies somewhat in 
the elevation of the spire, but otherwise seems very uniform. The 
spire is decollated in most of the specimens examined. It was thought 
at first to be binneyi, but the shell is much smaller and thinner with no 
umbilicus. 
The species is named in honor of Mr. A. A. Hinkley, Du Bois, 
Illinois, in whose collection the shells were found. 
Galba preblei (Dall). Plate XXV, figures 7-10. 
Lymnea (binneyi var.?) preblei Dart, Alaska Mollusks, p. 70, pl. 1, figs. 
1, 2, 1905.—Pirspry, Nautilus, XIX, p. 95, 1895. 
Lymnea binneyi Dati, Alaska Moll., p. 69, 1905 (part). 
Limnea ampla Binney, Proc. Phil. Acad., p. 330, 1861; L. & F.-W. Sh. 
N. A., ET, p..3%, 1865 (part). 
