1030 
MALAYSIAN LAND AND FRESHWATER MOLLUSCA, 
Family HELICIDA. 
9. Patula, Held, 1837. 
Isis, p. 916 ; Albers, Heliceen, p. = Eyryomjyhala, Beck, 
1837 = Delomphalus, Agassiz, 1837 = Euryomphala, Herrmansen, 
1846 = Z)iscMS, H. and A. Adams (Genera II. p. \\%) = Pitys, 
Harper Pease, 1871. 
Shell perspectively umbilicate, discoid or turbinate, depressed, 
rugose or striate ; whorls gradually enlarging ; aperture round, 
toothless ; lip acute ; jaws smooth or slightly striate, with a more 
or less marked median protuberance. About 327 species, with a. 
world-wide distribution. 
Patula qtjadrispira, von Mart.= Helix quadrispira, von Mart. 
Monatsber. Berl. Ak. 18th April, 1864, p. Patula quadris- 
pira (Rhytida), von Mart. 0.stas. Zool. II. p. 259, pi. 13, fig. 9 = 
Helix quadrispira, Pfr. INIon. Hel. V. p. 157. 
Ceram, Moluccas. 
P. OBSCURATA, Adams and Reeve,= Helix obscurata, Ad. and 
Reeve, Voy. Samarang, Moll. p. 59, pi. 14, fig. 18, (not Porro) = 
H. arthurii, Pfr. Zeitschx’. f. Malak. 1851, p. 16; Chemn. 2nd 
edit. Helix No. 940, pi. 143, figs. 23-25 ; Pfr. Mon. Hel. III. 
p. 102. 
Borneo. 
P. LUTEA, von Mart. = Helix lutea, von Mart. Monatsber. 
Berl. Ak. 18th April, 1864, p. 268 = Patula lutea {Macrocy- 
chides), von Mart. Ostas. Zool. II. p. 260, pi. 12, fig. 16 = Helix 
lutea, Pfr. Mon. Hel. V. p. 167. 
Burn, Moluccas. 
10. Helix, Linnaeus. 
Shell of variable form, smooth, rugose, striate, ribbed or tuber- 
culate, sometimes pilose ; orbicular-convex, planorboid, trochiform, 
sub-turriculated, or short bulimiform (monstrosities sinistral, or 
with the whorls moi*e or less uncoiled) ; aperture oblique, oval, 
