190 PULMONATA. 



tral margin regularly rounded, columellai' receding, much arched. 

 Lat. maj. 18, rain. 14, alt. 10 mill. 



Vitrina bicolor. Beck, MSS. 



Pfr. in Proc. Zool. Soc. 1848; Mo7i. Helic. ii. 499. 

 Hab, Guimaras, Philippines. 



20. Vitrina guimarasensis. 



Shell depressed-semiglobose, thin, striatulate, subdiaphanous, 

 greenish-pink ; spire rather small, slightly elevated ; suture mar- 

 gined ; whorls scarcely four, nearly level, verj' rapidly increasing, 

 the last inflated, subdepressed ; aperture oblique, lunate-subcir- 

 cular, as high as wide, slightly pearly within ; peristome very 

 thin, dextral margin regularly arched, columellar receding, much 

 arched. Lat. maj. 15, min. 11^, alt. 8 mill. 



Vitrina guimarasensis, Pfr. Proc. Zool. Soc. 1848 ; Mon, Helic. 



ii. 499. 

 Hab. Guimaras, Philippines. 



21. Vitrina Beckiana. 



Shell depressed-globose, circuit oval, very thin, striatulate, 

 pellucid, bright, veiy pale rubelline-honiy ; spire moderate, short, 

 obtuse ; whorls nearly four, very sUghtly convex, rapidly in- 

 creasing, the last subdepressed, wide at the base; apertiu-e 

 rather oblique, lunate-rounded, wider than high ; peristome sim- 

 ple, margins remote, regularly arched above, columellar shghtly 

 reflected above, receding at the base, much arched. Lat. maj. 

 16, min. 13, alt. 8 mill. 



Viti-ina Beckiana, Pfr. in Proc. Zool. Soc. 1848 ; Mon. Helic. 



ii. 499 ; Icon. t. 2. f. 37-39. 

 Vitiina peraffinis. Beck in Sched. 

 Hab. Phihppines. 



22. Vitrina politissima. 



Shell globose-depressed, rather solid, smooth, highly polished, 

 diaphanous, horny, radiated more darkly ; spu-e moderate, con- 

 vex ; suture impressed, submarginate ; whorls four, slightly 

 convex, rapidly increasing, the last rounded-depressed, wide at 

 the base ; aperture oblique, lunate, rounded, as high as wide ; 

 peristome simple, upper margin arched in front, columellar shghtly 

 arched. Lat. maj. 14, min. 11, alt. Ji mill- 

 Vitrina politissima. Beck, MSS. 



Pfr. in Proc. Zool. Soc. 1848 ; Mon. Helic. ii. 499. n. 21 ; 

 Icon. t. 3. f. 12-14. 

 Hab. Zebu, Philippines. 



