FAMILY HELICID^E HELIX. 39 



Helix inornata. 



(STATE COLLECTION.) 

 Helix nwrnala. Say, Jour. Acad. Nat. Sci. Vol. 2, p. 371. 



Description. Shell thin, subglobose, polished ; resembling, in its texture and external 

 configuration, H. cellaria. The whorls rounded, with numerous transverse wrinkles Spire 

 convex, little elevated. Suture distinct, but not deeply impressed. Umbilicus small, profound. 

 Lip simple, somewhat thickened near the base, slightly everted at that place over the umbilicus. 

 Pillar-lip smooth, polished. Aperture lunate, wider than high. 



Color. Pale yellowish horn-color, polished. 



Diameter, 0-5-0'7. Height, 0'3. 



This species has been obtained from Orange and Rockland counties in this State, and is 

 also found throughout the western district. It extends throughout the Western States, but 

 does not appear farther north than this State. According to Say, it is closely allied to ligera, 

 but is larger and not as solid, and the aperture is proportionally wider. 



Helix labyrinthica. 



PLATE III. FIG. 31— (STATE COLLECTION.) 



Helix labyrinthica. Say, Nich. Ency, Vol. 4 ; Jour. Aead. Nat. Sci. Vol. 1, p. 124. 

 H. id, Binney, Bost. Jour. Nat. Hist. Vol. 3, pi. 24, fig. 1. 



H. id. GorjLD, Invertebrata of Mass. p. 184, fig. 106. 



Description. Shell very small, conoidal ; the apex obtuse. Whorls six, rapidly decreasing 

 to the apex, with distinct elevated equidistant oblique lines. Suture distinct. Outer lip 

 somewhat reflected, rounded. Pillar-lip with a long tooth-like ridge (and sometimes beneath 

 it a second one), which appears to revolve within the shell parallel to the suture. The second 

 ridge, when present, terminates before it reaches a point on the pillar-lip, opposite to the 

 outer margin of the lip. Shell flat beneath, with the umbilical region excavated and the 

 umbilicus small. 



Color, varying from reddish brown to brownish horn-color. Outer lip often rose-colored. 

 Animal: Head slate-colored above ; foot white, linear; tentacles dark colored. 



Diameter, O'l. Height, 0*1. 



Found on fungus in decaying wood, or under logs and among decaying leaves. It is easily 

 distinguished by its strongly corrugated surface, and the internal ridge or ridges on the pillar- 

 lip. Ranges from Massachusetts, and perhaps farther north, to Missouri. In this State it 

 has been found near Troy, and in the neighborhood of New-York. 



