16 THE NAUTILUS. 
Planorbis parvus Say. Pond north of the R. R. bridge. 
Planorbis dilatatus Gould. Generally distributed. 
Gundlachia stimpsoniana (Smith). Doubtfully determined. 
Associated with Ancylus fuscus, in the reservoir; generally on 
the under side of fallen leaves from the surrounding timber, 
never on the leaves of the elm and hickory. Both species were 
plentiful in 1908 and 1909, but have since disappeared. 
Ancylus rivularis Say. Little Muddy creek. 
Ancylus tardus Say. Beaucoup creek. 
Ancylus fuscus Adams. Reservoir and Little Muddy creek. 
Ancylus kirklandi Walker. Little Muddy and Beaucoup 
creeks. 
Physa heterostropha Say. Sheller lake. (This is a R. R. 
reservoir. ) 
Physa gyrina Say. All streams and other bodies of water. 
Physa sayi Tappan. Reservoir, one specimen; it may bea 
freak of gyrina. 
Physa hildrethiana Lea. Pond north of the R. R. bridge. 
Physa elliptica Lea. Above the R. R. bridge. 
| Physa integra Haldeman. Pond on the Hinkley farm. 
Physa oleacea Tryon. Pool near the R. R. bridge. 
Physa crandalli Baker. Pond on the Hinkley farm. 
Pleurocera neglectum (Anthony). Little Muddy between 
Du Bois and Sheller lake; quite different from C. subulare. 
Amnicola cincinnatiensis Lea. Puncheon, Locust and Little 
Muddy creeks. 
Pomatiopsis lapidaria Say. Low land of Little Muddy creek, 
scarce. 
Viviparus contectoides Binney. Beaucoup creek, a small 
variety. 
Campeloma subsolidum (Anthony). Little Muddy, Locust 
and Beaucoup creeks. 
Quadrula latecostata (Lea). Little Muddy creek. 
Lampsilis distans (Anthony). Little Muddy and Locust 
creeks. 
Lampsilis subrostratus (Say). Little Muddy creek and 
Sheller lake. 
Lampsilis texasensis (Lea). Little Muddy creek. 
