GASTEROPODA. HELICID. 73 
Animal cinereous or grey ; tentacula of the same colour, or 
tinted with pale sooty-black. Foot very pale grey, or whitish. 
Genus 29. ZonIrTEs. 
Zonites, De Montfort, Say. 
Testa depressa, eequilateralis. Umdbilicus centralis apertus. 
Peritrema posticé imperfectum. 
Synopsis Specierum. 
1. Ericetorum. ‘Testa albida, opaca, anfractibus transversim 
elevato-striatis, seepius longitudinaliter fasciatis. 
2. radiatus. Testa rufescente-grisea, subcarinata, ad dextram 
purpureo-badio-radiata, anfractibus transversim sulcatis. 
3. rupestris. Testa brunnea, anfractibus transversim striolatis, 
apertura subcirculari. 
4. nitidus. esta pellucida, nitida, ad dextram lutescente- 
cornea; albida ad sinistram, anfractibus quinque trans- 
versim strigosis. 
5. erystallinus. Testa subviridescente-hyalina, nitida, anfrac- 
tibus 43 transversim tenuissimé strigosis. 
1. ZoniTES ERICETORUM. 
Z. testa albida, opaca, anfractibus transversim elevato-striatis, 
seepius longitudinaliter fasciatis. 
Helix Ericetorum, Mill. Verm. Hist. 236; Mont. Test. Brit. 
437.—Suppl. t. 24. fig. 2; M. & R. Trans. Linn. Soc. 
vill. 194; Drap. Hist. des Moll. 107; Donov. Brit. Shells, 
t. 151. fig. 2; Flem. Edinb. Encycl. vu. 80; Dill. Desc. 
Cat. 910; Turt. Conch. Dict. 49. 
Helix Erica, Da Costa, 58. t. 4. fig. 8. 
Helix albella, Penn. Brit. Zool. iv. 132. pl. 35. fig. 122. 
Helix Cespitum, Drap. Hist. des Moll. 109. 
Habitat in arenosis, et in cespitosis aridis. 
Shell whitish, opake, the whorls with transverse elevated 
strize, often fasciated longitudinally. 
Animal transparent grey above, with a bluish band on each 
side of the neck. Tentacula slender, and more or less tinged 
with pale brown. 
E 
