124 IIELIX §. 24. 



nenlibus concentricis cxaspcrata; anfr. 6 convexiusculi, lenle 

 accrescentes, ultimus basi inflatus, confertim et radiatim costulato- 

 striatus; umbilicus mediocris, pervius; apertura lunato-elliptica; 

 perist. simplex, vix incrassatum, marginibus callo lineari junclis. 

 — Diam. maj. 21 , min. 19, alt. 10 mill. (Coll. Nr. 168.) 

 Helix radula Pfr. in Proc. Zool. Soc. 1845. p. 40. 



— — Phil Icon. I. 7. p. 1 55. t. 4. f. H . 



— — Chemn. ed. II. Helix N. 621. t. 97. f. 4 — 6. 

 Habitat in provincia Iloconensi insulac Luzon (Cuming). 



321. H. strigilis Pfr. 



T. umbilicata , depressa , lenticularis , tenuis, pellucida, pal- 

 lide cornea, acute carinata; spira parum elevata; anfr. 6 angusti, 

 vix convexiusculi , superne confertim costulato-striati, lineis elc- 

 vatis concentricis reticulati, ultimus basi convexior, laevigatus, 

 nitidus; umbilicus mediocris, cylindricus; apertura subverticalis, 

 angulato-lunaris ; perist. simplex, acutum, margine supero brevi, 

 strictiusculo, basali valde arcuato. — Diam. maj. 12, min. 11, 

 alt. 5 '/2 mill. (Mus. Cuming. et Coll. Nr. 169.) 



Helix strigilis Pfr. in Proc. Zool. Soc. -18 45. p. 12 4. 



— — Chenrn. ed. U. Helix N. 543. t. 87. f. 11—14. 

 Ilabitat ad Himamaylan insulae Negros Philippinarum (Cuming). 



322. H. albocincta Pfr. 



T. umbilicata, orbiculato-convexa , tenuiuscula, superne re- 

 gulariter et confertim striata, sericina, fulvo-coruea , carinata; 

 spira depresso-conica, apice obtusa; anfr. 5 '/2 convexi, carina 

 alba cincti, ultimus basi sublaevigatus, lineis subtilibus, concen- 

 tricis notatus; umbilicus mediocris, pervius; apertura obliqua, 

 angulato-lunaris; perist. simplex, acutum. — Diam. maj. 11, 

 min. 10, alt. 5 mill. (Coll. Nr. 170.) 



Ilelix alhodncta Pfr. in Proc. ZooL Soc. 1845. p. 123. 



— — Chemn. ed. IL Helix N. 545. t. 87. f. 17 — 20. 

 Ilabitat ad Ilimamaylan insulae Negros (Cuming). 



323. H. ptychodes Pfr. 



T. umbilicata, depressissima, discoidea, tenuissima, arcuato- 

 plicata, sub epiderinide tenui, fusca, decidua hyalina; spira pla- 

 niuscula; anfr. V/i — 5 planulati, ultimus basi vix convcxior; 

 umbilicus mediocris; apertura perobliqua, ainpla, angulato-lunaris; 

 perist. simplex, acuturn. — Diam. maj. lO/s, min. 9, aU. 3'/i mill, 

 (Mus. Cuming.) 



IlelLjc ptijchodes Pfr. m Pioc. Zool. Soc. 1845. p. 137. 

 ilal)itat prope Blueliclds iusulae Jamaicae (Gosse). 



