FAMILY COLIMACEA. 47 



crystallinus. Shell very small, rather smaller than purus, 

 narrowly umbilicated, bright crystalline opal horny. 



1. Zonites cellar ius. Cellar Snail. 



Shell ; rather narrowly deeply umbilicated, depressly 

 orbicular, greenish-yellow, pale, very glossy, spire 

 convexly flattened, sutures linearly channelled, 

 whorls six, narrow, increasing slowly, longitudi- 

 nally obscurely plicately striated ; aperture ob- 

 liquely lunar. 



Helix cellaria, Midler (1774), Verm. Hist. vol. ii. p. 28. 



Helix lucida, Montagu (1803), Test. Brit. p. 425. (not of Draparnaud nor 



Studer) . 

 Helix nitens, Maton andRackett (1807), Trans. Linn. Soc. vol. viii. p. 198. 



pi. v. f. 7. (not of Ginelin nor Sheppard). 

 Vortex cellaria, Oken (1815), Lehrb. Nat. vol. iii. p. 314. 

 Helix glaphyra, Say (1817), Nick. JEncycl. vol. iv. pi. i. f. 3. 

 Zonites lucidus, Leach (1820), Syn. Moll. p. 75. 

 Oxychilus cellarius, Fitzinger (1833), Syst. Verzeichn. p. 100. 

 Helicella cellaria, Beck (1837), Ind. Moll. p. 6. 

 Polita cellaria, Held (1837), Isis,y. 916. 

 Zonites cellarius, Gray (1840), Turt. Man. p. 170. 

 Helix (iMcilla) cellaria, Lowe (1854), Pro. Zool. Soc. part 22. 177. 

 Zonites (Aplostoma) cellarius, Moquin-Tandon (1855), Hist. Moll. vol. ii. 



p. 78. pi. 9. f. 12. 

 Hah. Throughout Europe. Madeira. Northern, Eastern, and Middle States 



of America. (Chiefly in cellars and drains, under loose bricks or 



among stones.) 



This is the largest species of the genus. Z. nitidulus comes very 

 near to it in size, but Z. cellarius may be distinguished by its more 

 depressly discoidal form and glossy substance, uniform pallid trans- 

 parency, and smaller contracted umbilicus. It is very generally 

 distributed throughout the British Isles, having a preference for 

 damp places in drains and cellars. Mr. Lowe collected Z. cellarius 

 in Madeira, and it has become widely naturalized in the United 

 States, from being transported with casks or other packages. It 

 was first noticed in America by Mr. Say, who collected it in 1817, in 

 gardens, in the vicinity of Philadelphia, and described it as a new 

 species, under the name of Helix glapliyra. 



