250 
subarcuata. Apertura perobliqua, lunato-rotundata, intus alba fasciis vix trans- 
Jucentibus; peristoma album, late expansum, ad basin leviter reflexum. 
Alt. 28, lat. 27, apert. alt. et diam. 19 mm. 
Helix orbitula Sowergy, in: Proc. zool. Soc. London 1840, p. 103. — PFEIFFER, 
Symbolae, Il, p. 35; Monogr. Helic. viv., vol. I, p. 224. — 
MArTısı & CuemnIitz, Conch. Cab., ed. Il, p. 296, t. 50, 
fig. 7, 8. — DEsHAYES, in: Ferussac, Hist. I, p. 311, no. 369, 
t. 108A, fig. 7, 8. — Reeve, Conch. icon., t. 15, no. 60. — 
(Helieostyla) ALBERs, Heliceen, p. 104. — MARTENS, ibid., 
ed. II, p. 175. — (Cochlodryas) Pıtspry, in: Tryon, Manual, 
vol. VIL, p. 179, t. 58, fig. 98, 99. — (C.) MÖLLENDORFF, 
Verzeichniss, in: Abh. Ges. Görlitz, vol. 22, p. 131, no. 547; 
Sep. p. 106. — Hiıpar6o, in: J. de Conchyl. 1887, vol. 35, 
p. 152, 1896, vol. 44, p. 303; Obras, Atlas, t. 38, fig. 6, 7. 
Helix chlorogrammica VALENCIENNES in Mus. Par. 
Insel Sibay, südlich von Mindoro (nicht auf Mindoro selbst). 
161. Cochlostyla (Cochlodryas) tenera SOwERBY. 
Taf. LI, Fig. 6, 7. 
Testa imperforata, globoso-conica, tenuis, laevis, alba, fasciis nigricantibus et 
viridibus ornata, basin versus viridescens; spira depresso-conica, apice albo. 
Anfraetus 4'/; eonvexiusculi, ultimus spirae altitudinem subaequans, antice des- 
cendens. Columella subrecta, intrans, tenuis, subexcavata. Apertura lunato- 
rotundata, fasciis distinete translucentibus; peristoma simplex, parum expansum, 
album. 
Diam. maj. 28,5, min. 25, alt. 31 mm (sec. PFEIFFER: 25: 21,5: :20 mm). 
Helix tenera SOWERBY, in: Proc. zool. Soc. London 1840, p. 102. — PFEIFFER, 
Symbolae, II, p. 40; Monogr. Helic. viv., vol. I, p. 229. — 
MARTINI & CHEMNITZ, Conch. Cab., ed. II, p. 293, no. 284, 
t. 49, fig. 12, 13. — Reeve, Conchol. icon., t. 16, no. 62. — 
(Helicostyla) Asers, Heliceen, p. 104. 
Cochlostyla (Helicostyla) tenera MARTENS, in: Albers, Heliceen, ed. II, p. 175. — 
PILsBRy, in: Tryon, Manual, vol. VII, p. 179, t. 36, fig. 31, 32. 
— (Cochlodryas) MÖLLENDORFF, Verzeichniss, in: Abh. Ges. 
Görlitz, vol. 22, p. 131, no. 548; Sep. p. 106. — Hiparco, 
