FAMILY HELICIDA — HELIX. 31 
HELIX INDENTATA. 
PEATE III. FIG. 26. a.n.— (STATE COLLECTION.) 
Helix indentata, Say, Acad. Nat. Sciences, Vol. 2, p. 372. 
Hw. Binney, Journ. Nat. History, Vol. 3, pl. 29, fig. 1. 
td: Govtp, Invertebrata of Mass, p. 181, fig. 109. 
Description. Shell small, depressed, highly polished, subiridescent, pellucid, very fragile. 
Whorls four, slightly convex, with regular subequidistant impressed transverse lines, with the 
intervening spaces very smooth ; from twenty-eight to thirty of these lines on the body-whorl, 
extending to the umbilicus. Suture not deeply indented. Aperture moderate. Lip simple, 
terminating at its lower extremity at the centre of the base of the shell. Umbilical region 
deeply indented, but not perforated. 
Color. Polished light horn-color: the animal bluish black above; immaculate, lighter 
behind. 
Diameter of the shell, 0-15-0-22. Height, 0:07-1:09. 
This species is found, like the preceding, about decaying logs and fallen timber. In some 
specimens the umbilicus is open and patulous, and the animal of a light blue color. It has 
been observed from Vermont to Ohio. In this State it was found by Mr. Newcomb in the 
neighborhood of Troy. 
HELIx CLAUvUsA. 
PLATE Il. FIG.13. a.s.—(STATE COLLECTION.) 
Helix clausa. Savy, Acad. Nat. Sciences, Vol. 2, p. 154. Ip. Am. Conchology pl. 37. 
HH. id. Binney, Bost. Jour. Nat. Hist. Vol. 1, p. 482, pl. 15. 
Description. Shell fragile, somewhat elevated, subglobular, slightly perforated. Whorls 
four to five, convex, with minute oblique strie. Aperture somewhat contracted. Lip reflected, 
flat, nearly covering the umbilicus, and occasionally entirely so, but not dilated there as 
in albolabris. 
Color. Yellowish brown or russet ; the animal dusky black. 
Diameter, 0°5-0+7. Height, 0°5. 
This species is allied to albolabris, but is not much more than half its size. It may be 
considered as a southern species, extending to New-Jersey and New-York. 
