FAMILY COLIMACEA. 



49 



The animal varies in both, species, from blue-black to violet ; 

 a yellow variety noticed in Z. cellarius has not been observed 

 in Z. alliaria. 



3. Zonites nitidulus. Dull Zonites. 

 Shell ; rather openly nmbilicated, depressly convex, dull horny, 



rufous above, opake yellowish-white beneath, whorls 



five, rather impressed at the sutures, then narrowly 



rounded ; aperture rotundately lunar. 

 Helix nitidula, Draparnaud (1805), Hist. Moll. p. 117. 

 Oxychilus nitidulus, Fitzinger (1833), Syst. Yerzeichn. p. 100. 

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

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

 Zonites nitidulus, Gray (1840), Turt. Man. p. 172. 

 Helix Helmii, Gilbertson (1840), Gray, Turt. Man. p. 173. 

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



p. 83. pi. ix. f. 12, 13. 

 Hob. Throughout Europe (among moss and under stones in sheltered 



places) . 

 Larger than the preceding species, but hardly so large as Z. cel- 

 larius, Z. nitidulus has not the glossy shell of either. The upper 

 surface of the shell is characterized by a dull reddish-fawn colour, 

 whde around the umbilicus, which is more perspectively open, it is 

 of a dull opake yellowish-white. Our figure of this species is 

 drawn from an unusually large specimen. Mr. Jeffreys remarks 

 that the animal is shy, and deHghts in dark places. 



C=& 



4. Zonites purus. Transparent Zonites. 

 Shell ; largely umbilicated, depressly orbicular, greenish glassy, 



spire convex, sutures rather impressed, whorls three 



and a half to four, slopingly rounded, narrow, faintly 



striated ; aperture obliquely lunar. 

 Relix nitidula var., Draparnaud (1805), Hist. Moll. p. 117. pi. 



Tin. f. 21, 22. 

 Helix nitidiosa, Ferussac (1822), Tail. Syst. p. 45 (without 



characters) . 

 Helix pura, Alder (1830), Trans. Nat. Hist. Soc. Northumh. 



vol. i. p. 37. 



