FAMILY HELICIOE — HELIX. 



Helix indentata. 



PEATE III. FIG. 26. a. b. — (STATE COLLECTION.) 



Helix indentata. Say, Acad- Nat. Sciences, Vol. 2, p. 372. 



H id. Binney, Journ. Nat. History, Vol. 3, pi. 29, fig. 1. 



H id. Gould, Invertebrata of Mass. p. 181, fig. 109. 



Description. Shell small, depressed, highly polished, subiridescent, pellucid, very fragile. 

 Whorls four, slightly convex, with regular sub-equidistant 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 apimal bluish black above ; immaculate, lighter 

 behind. 



Diameter of the shell, • 1 5 - • 22. Height, • 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 clausa. 



PLATE II. FIG. 13. a. B. — (STATE COLLECTION.) 



Helix clausa. Say, Acad. Nat. Sciences, Vol. 2, p. 154. Id. Am. Conchology pi. 37. 

 H. id. Binney, Bost. Jour. Nat. Hist. Vol. 1, p. 482, pi. 15. 



Description. Shell fragile, somewhat elevated, subglobular, slightly perforated. Whorls 

 four to five, convex, with minute oblique strias. 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. 



