HYALINA. 395 



scending, g:enerally anteriorly dilated ; spire depressed, very rarely 

 orbicularly-conic, aperture roundly lunate ; peristome thin, acute, 

 straight. Jaw simple (neither furrowed nor dentate), arcuate, its 

 lower edge acute, with a rostriform projection in the middle. Lin- 

 gual membrane with central tricuspid teeth, a few bicuspid laterals 

 in a straight row, and numerous thorn-shaped, curved uncini in a 

 curving transverse series, modified greatly in size as they pass off 

 laterally. 



Hyalina cellaria. 



Tig. 104. 



Shell orbicular, depressed, thin, pellucid, glistening, smooth; whorls five, flat- 

 tened; aperture rounded ; lip simple; umbilicus deep. 



Helix cellaria, Muller, Hist. Venn. ii. 28. — Pfeiffkr, Mon. Hel. Viv. i. 111. — BiN- 

 NEY, Bost. Journ. ill. 421 ; Terr. Moll. ii. 2.30, iil. 29, fig. 4. — Gould, Inv. 180, fig. 

 104, cxcl. syn.? (1841). — 1)e Kay, N. Y. Moll. 37, pi. 3, fig. 3.5 (184.3). — Leidy, 

 in Terr. Moll. U. S. i. 233, pi. 7, fig. 1 (1851), Anat. — W. G. Binney, Ter. Moll, 

 iv. 111. 



Ilijalina cellaria, Morse, Journ. Pord. Sot-, i. 12, figs. 18, 19 ; pi. 5, fig. 20 (1864) ; Anicr. 

 Nat. i. 541, fig. 29 (1867). — Tryon, Am. Journ. Conch, ii. 249, pi. 3, fig. 19 (1866). 



Helix (jiaphijra, S.vY, Nieh. Encvcl. Am. ed. pi. 1, fig. 3 : Binney's ed. 7, pi. 69, fig. 3. 

 — E.\roN, Zool. Text Bool<, 194. — Bl.wd, N. Y. Lye. Ann. vi. 352, not of Pfeif- 



FER, KeEVE, DeSH.\YES. 



Shell small, orbicular, depressed, concave beneath, thin, pellucid, 

 smooth, and glistening ; whorls five, slightly convex, Avith minute, 

 almost imperceptible lines of growth, otherwise highly-pol- 

 ished ; color light greenish, horn colored above, drab colored ^'s^^*- 

 beneath, or milky-white. Aperture rounded, but broader 

 than high ; lip simple, very thin and sharp ; base elegantly 

 rounding into a rather large and deep umbilicus. Diam- 

 eter rather less than half an inch. 



Animal has its upper surface light indio-o-blue, darkest „ „ 

 on the head, neck, and eye-peduncles, collar greenish, eyes 

 black ; foot narrow and slender, not much exceeding in length the 

 diameter of the shell, and terminating acutely. 



Found in gardens, damp cellars, about cisterns, and similar moist 

 and fertile localities. 



This species is common in damp cellars in Boston, and was no- 

 ticed during 1862 in Providence, Salem, Lynn, Marblchead, Port- 

 land, and Halifax. Linsley includes it in his list of Connecticut 

 shells. Li 1804 it was found at Astoria, Long Island, New York. 



