1030 MALAYSIAN LAND AND FRESHWATER MOLLUSCA, 



Family HELICIDA. 



\ 9. Patula, Held, 1837. 



Isis, p. 916; Albevs, Heliceen, p. &^ = Eyryompliala, Beck, 

 1837 — Delomphalus, Agassiz, 1837 = Euryomphala, Herrmansen, 

 1846 = i>rscMS, H. and A. Adams (Genera 11. p. W^) = 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 3 "2 7 species, with a 

 world-wide distribution. 



Patula quadrispira, von Mart.^ Helix quadrispira, von Mart. 

 Monatsber. Berl. Ak. 18th April, 1864, p. 267= Patula quadris- 

 pira (Ehytida), von Mart. Ostas. Zool. U. p. 259, pi. 13, fig. 9 = 

 Helix quadrispira, Pfr, Mon. Hel. V. p. 157. 



Ceram, Moluccas. 



P. obscurata, Adams and Reeve, = Helix obscurata, Ad. and 

 Reeve, Voy. Samarang, Moll. p. 59, pi. 14, tig. 18, (not Porro) = 

 E. arthurii, Pfr. Zeitschr. f. Malak. 1851, p. 16; Chemn. 2nd 

 edit. Helix No. 940, pi. 143, tigs. 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- 

 cloides), von Mart. Ostas. Zool. II. p. 260, pi. 12, tig. 16 = Helix 

 lutea, Pfr. Mon. Hel. V. p. 167. 



Buru, 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 more or less uncoiled) ; aperture oblique, oval, 



