

FAMILY COLIMACEA. 51 



other conchologists, myself among the number, with Z. pur us, with 

 which it has a close resemblance, but is constantly distinct. The 

 shell, besides being regularly radiately striated, acquires a different 

 form from the last whorl being more outwardly produced at the 

 periphery ; and yet the umbilicus is smaller. It is of the same 

 transparent greenish-glassy substance as Z. purus ; and a careful 

 application of the lens is necessary to bring out its specific cha- 

 racters in obvious relief. The animal, according to Mr. Alder, is 

 just the reverse in colour, black in place of white. It appears to be 

 very generally distributed throughout Central Europe and the 

 British Isles, and it has been transported and become naturaHzed in 

 the United States. Mr. Thompson, one of the most diligent of our 

 observers, describes having procured it in Ireland, in moist spots in 

 the wildest and bleakest localities, as well as in woods. 



6. Zonites nitidus. Shining Zonites. 



Shell ; rather largely umbilicated, moderately depressed, brownish 

 fulvous, shining, spire convex, sutures impressly 

 channelled, whorls four to four and a half, narrow, 

 slopingly rounded, finely radiately striated ; aperture 

 obliquely lunar. 

 Helix nitida, Miiller (1774), Verm. Hist. vol. ii. p. 32 (not of 



Grmelin nor Draparnaud). 

 Helix succinea, Stucler (1789), Fawn. Helv. in Coxe's Travels 



in Switzerland, vol. iii. p. 429 (not of Miiller). 

 Helix lucida, Draparnaud (1805), Hist. Moll. p. 103. 

 Helicella nitida, Eisso (1826), Hist. Nat. Hurop. Merid. vol. iv. p. 72. 

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

 Polita lucida, Held (1837), Isis, p. 916. 

 Helicella succinea, Beck (1837), Ind. Moll. p. 7. 

 Zonites lucidus, Gray (1840), Turt. Man. p. 174. pi. iv. f. 38. 

 Zonites (A-plostoma) nitidus, Moquin-Tandon (1855), vol. ii. p. 72. pi. vii. 



f. 11 to 15. 

 Hob. Central and Southern Europe. Iskardo, Thibet. United States. 

 Britain (under stones in shady places, in pine beds and orchid houses) . 

 The most obvious characteristic of this species is its brownish ful- 

 vous colour and shining aspect. It is a much larger shell than 

 Z. purus or radiatulus, rather more openly umbilicated ; and the 

 sutures of the spire are impressed into a narrow channel. The 

 radiating longitudinal striae, though delicate, are very apparent, but 



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