GASTEROPODA. HELICIDZ. 59 
Peritrema anticé interné marginatum ; | ote 
pe eaamM Fo. Ses Why). 1G dines Wes Zoe Baers: 
Genus 23. VITRINA. 
Vitrina, Draparnaud. 
Helico-Limax, Férussac. 
Testa tenuis: Apertura magna, semilunaris: Peritrema nul- 
lum. Tentacula superiora mediocria: inferiora brevissima : 
Pallium collum protegens, superné transversim crenatum. 
Shell slender, subglobose, inequilateral. Aperture large ani 
semilunar. Peritreme none. Umbilicus none. 
Upper tentacula of a moderate length ; the under ones very 
short. Mantle covering the neck ; its upper part transversely 
wrinkled. 
The animal is too large to be enabled to retire perfectly 
within its shell. 
1. VirrinA DRAPERNALDI. 
V. testa viridi, subdepressa, hyalina, nitida, glaberrima ; aper- 
tura subovata, anfractibus tribus. 
Helix pellucida, Mill. Verm. Hist. 215; Dill. Dese. Cat. 947. 
Vitrina pellucida, Drap. Hist. des Moll. 119. pl. 8. figs. 34-37. 
Helix Drapernaldi, Cuv. Reg. Anim. i. 405. 
Helix elliptica, Brown, Mem. Wern. Soc. ii. 525. pl. 24. fig. 8. 
Habitat inter muscos et sub lapidibus satis frequens. 
Shell green, transparent, slightly depressed, very smooth and 
shining, with three whorls ; the aperture somewhat ovate. 
This shell, which is not uncommon amongst mosses or under 
stones, was observed in Scotland several years since, about the 
same period, by Dr. Fleming and my ‘self ; and was communi- 
cated by each party to Montagu, who assured us that it was 
nothing more than the young i his Helix nemoralis. It has 
since been observed by Captain Brown, and described by him 
as above quoted. I have received it from the Rev. Revett 
Sheppard, who observed it in Norfolk, and proposed to name 
it Helix glaucina. 
The specifie names pellucida, elliptica, and glaucina, however 
good they might have been to distinguish a species of the 
