Characters, Shell; depressed, few whorled, last whorl the largest, without fold on the columella. Inoperculate.
Soft parts; foot rounded, tentacles long, bearing eyes; another pair of eyes situated on the inner bases of the tentacles. Fluviatile, phytophagous.
Genus Pompholyx, Lea.
Proc. Phil. Acad., Ap. 1st, 1856.
Type P. effusa Lea, sp. unica. [[Fig. 28.]]
Fig. 28.
Shell; small, swollen, with three whorls, the last much the largest. Above, rounded planulate, suture deep but not channelled. Below, not umbilicated, rounded convex. Aperture large, effuse, internally shining. Columella flattened, not folded; externally, in fresh specimens, greenish horn color; dead ones nearly white or waxy brown. Alt. 0.14 in., major diam. 0.2, min. diam. 0.16 in.
Soft parts. Foot rounded truncate; short, bluish-ash color, darker on the margin. Lips broad, semilunar. Tentacles long, eyebearing; tips pale yellow, eyes black; a second pair sessile on the inner bases of the tentacles. Body delicate brownish olive green; a light streak just behind and outside of base of each tentacle.