30 . 
LASU SHELIiS. 
S.A. NAT., 
VOL. XVIir, No. 2 
hayes’ name was even sunk as a synonym, but the South Aus- 
tralian shell was separated as distinct under the name bednalli 
Brazier. A superficial granose sculpture distinguishes the latter, 
and is here used as a generic feature until the anatomy is well 
known. 
Exilibadistes sutilosa. PI. I, fig. 13. 
1850. Helix sutilosa Deshayes, Hist. Nat. Moll. Terr. (Ferussac), 
Vol. I, p.203, (pi. 17A, ff. 18-19, livr. 29, 1829), ex 
Ferussac, Tabl. Syst., p.47, Jan: p.43, June 1921. nomen 
nudum Isles St. Pierre & St. Francois, South Australia 
(Peron). 
1872. Helix bednalli Brazier, Proc. Zool. Soc. (Lond.), 1871, 
p.641. May 2 1872. Near Adelaide, South Australia. 
No specimens from the small islands are available, but 
Kangaroo Island shells are regarded as conspecific tentatively, 
and these differ from the mainland ones in being smaller, rougher, 
and having the umbilicus still maintained as a chink, whereas 
the columella is reflected over and appressed in Adelaide exam- 
ples. Consequently the two names may be utilised In subspecific 
sense. 
Genus Meracomelon. 
1933. Mieracomelon Iredale, Rec. Austr. Mus., Vol. XIX, p.S2, 
August 2. 
Orthotype Helix rufojasciata Brazier. 
Medium sized, 15-30 mm., shells, flattened helicoid, with the 
periphery keeled sometimes in the juvenile but very rarely in 
the adult stage, texture thin, coloration generally banded, sculp- 
ture subgranulose, umbilicus small, open, columella reflected, 
outer lip usually thin. 
The series of shells classed under this genus is very complex, 
many species having been named and there are apparently more, 
but the differences are slight and may be regarded as of repres- 
entative value only. 
Key to Species. 
Shell large, 25 mm., whorls rounded, spire a little elevated, 
umbilicus narrow, sculpture granulose 
ruf of as datum' 
Shell smaller, 20 mm., spire less elevated, umbilicus more 
open, sculpture more strongly granulose extensum. 
Shell larger, 30 mm., more globose, and more granulose than 
rufofasdatum, mouth more open but umbilicus 
, hidden by columellar reflection loriolianum. 
