50 NEW-YORK FAUNA — MOLLUSCA. 
Pura ovata. 
PLATE IV. FIG. 50.—(STATE COLLECTION.) 
Pupa ovata, VeERTIGO id. Say, Journ. Acad. Nat. Sc. Vol. 2, p, 375. 
P. modesta. Ip. Long’s Exped. St. Peter’s, Vol. 2, p. 259, pl. 15, fig. 5. (Immature.) 
P. modesta ? Gouup, Invertebrata of Mass. p. 188, fig. 119. 
P. ovata. Apams, Am. Journal of Science, Vol. 40, p. 271. 
Description. Shell minute, subovate, thin. Apex obtuse. Whorls five to six, rounded, 
apparently smooth, but with minute transverse wrinkles. Aperture semioval, oblique. Lip 
reflected, but not flattened. Teeth five, slender and sharp: three on the pillar-lip, parallel 
to each other, the upper and lower small, the latter sometimes obsolete; the two other 
approximate, extending at right angles to the three preceding ones. Umbilicus small, but 
distinct. 
Color. Amber or dusky brown. 
Diameter, 0°02; height, 0°05 — 0°1. 
Occurs in moist places under pieces of wood, from Vermont to Pennsylvania. 
Pura CORTICARIA. 
PLATE IV. FIG. 49.— (STATE COLLECTION.) 
Pupa corticaria. Say, Nich. Encycl. Am. ed. No. 1, pl. 4, fig. 5. 
P. id. Goutp, Bost. Jour. Nat. Hist. Vol. 3, p. 397. 
Description. Shell nearly cylindrical. Apex rounded. Whorls four to five, not perceptibly 
wrinkled or striate. Aperture suborbicular, often irregular: lip reflected. A tooth on the 
pillar-lip, which is near the outer angle. Inner angle with an angular projection resembling 
a second tooth, sometimes obsolete. 
Height, 0-1. 
Common under the bark of trees. 
Pura PENTODON. 
PLATE IV. FIG.48; AND PLATE XXXV. FIG. 337. 
Pupa pentodon. Verticoid. Say, Jour. Acad. Nat. Sc. Vol. 2, p. 376. 
P.  curvidens. Gouwp, Invertebrata of Mass. p. 189, fig. 120. 
P.  tappaniana. ADams: 
Description. Shell minute, subovate, approaching cylindrical ; apex obtuse, rounded. Suture 
distinct, but not deeply impressed. Whorls five, convex, glabrous. Aperture semioval. Pillar- 
lip bidentate, of which a single prominent one is medial ; the other much smaller, remote, and. 
placed in the basal angle of the columella. Lip regularly arcuated, tridentate; the tooth 
