124 HELIX §. 24. 



nentibus concentricis exasperata; anfr. 6 convexiusculi, lente 

 accrescentes, ultimus basi inflatus, confertim et radiatim costulato- 

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

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

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

 Helix i^adula Pfr. in Pioc. Zool. Soc. 1 843. p, 40. 



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



— — Che^nn. ed. II. Helix N. 621. t. 97. f. 4 — 6. 

 Habitat in provincia Iloconensi insulae Luzon (Cuming). 



321. H. strigilis Pfr. 



T. umbilicata, depressa, lenticularis , teiiuis, pellucicla, pal- 

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

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

 vatis concentricis reticulati, ultimus basi convexior, laevigatus, 

 nitidus; umbilicus mediocris, cylindricus; apertura subverticalis, 

 angulato-Iunaris ; 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. -1845. p. 12 4. 



— — Chemn. ed. IL Helix N. 543. t. 87. f. 1 1 —1 4. ^ 

 Habitat ad Himamaylan insulae Negros Philippinarum (Cuming). 1 



322. H. albocincta Pfr. 



T. umbilicata, orbiculato-convexa , tenuiiiScula', stiperrie re- 

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

 spira depresso-conica, apice obtusa; anfr. bV^ 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. (CoII. Nr. 170.) 



Helix albocincta Pfr. in Proc. Zool. Soc. 18 45. p. 123. 



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



Habitat ad Himamaylan insulae Negros (Cuming). 



323. H. ptychodes Pfr. 



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

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

 niuscula; anfr. 4 '/2 — 5 planulati, ultimus basi vix convexior; 

 umbilicus mediocris; apertura perobiiqua, ampla, angulato-lunaris; 

 perisL simplex, acutum. — Diam. maj. 10 '/3, min. 9, aU. 3 '/3 mill, 

 (Mus. Cuming.) 



Helix ptychodes Pfr. in Pi'oc. Zool. Soc. 1845. p. 137. 

 Habitat prope Blueliclds insulae Jamaicae (Gosse). 



