24 
f) Formenkreis der Obbina rota (Bron.). 
26. Obbina rota Broperır. 
Taf. IV, Fig. 8. 
Testa medioeriter et pervie sed semiobteete umbilicata, lentieularis, acute carinata, 
infra quam supra magis inflata, irregulariter costata, costis basalibus validioribus 
ad carinam tubercula alba formantibus, sordide albida, saepe fulvo suffusa, 
fasciis angustis castaneis duabus in parte supera, dupliei ad carinam, quarta infera 
ornata. Spira parum elevata, apice magno, planiusculo, laevi, nitido; sutura im- 
pressa, inter anfractus inferos irregulariter undulata. Anfractus 4',;—5 planius- 
culi, regulariter accrescentes, ultimus carina ad costas undulata utringue com- 
pressa cinetus, ad basin inter costas distinete spiraliter sulcatus, antice constrietus 
et subite valde deflexus Apertura subhorizoutalis, ovato-lanceolata, extus dis- 
tinete rostrata; peristoma simplex, late expansum, solutum, callo lamelloso 
continuum, margine basali reflexo, unidentato. 
Diam. maj. 29, min. 24, alt. 11 mm. 
Helix rota (Carocolla) BroDErıp, in: Pr. zool. Soc. London 1841, p. 45. — 
PFEIFFER, Symbolae Il, p. 38. — REEVE, Conchol. system. II, 
t. 167, fig. 1, 4 — MARrTINI & CHEMNITZ, Conch. Cab. ed. 2, 
vol. ]J, 12, p. 68, t. 78, fig. 16—18. — (Gallinula) HARTMANN, 
(Grasteropoda, vol. I, p. 197, t. 76. — PFEIFFER, Monogr. 
Heliceor. vivent. vol. 1, p. 403. — DESHAYES, in: FERUSSAC, 
Histoire, p. 356, t. 101, fig. 16. — REEVE, Conchol. icon. 
t. 30, p. 128. — (Philina) Aubers, Heliceen, ed. 1, p. 119. — 
(Obba) PFEIFFER, Versuch, in: Malacozool. Bl. 1855, vol. 2, 
p- 157. — (O.) MARTENS, in: ALBERS, Heliceen, ed. 2, p. 159. 
— (O.) MoERcH, in: Journal de Conchyliologie 1865, vol. 13, 
p- 381. — (O.) FRAUENFELD, Verh. zool.-bot. Ges. Wien 1869, 
vol. 19, p. 876. — (Obbina) C. SEMPER, Landmoll. Philippinen 
vol. 2, p. 122. — (Philina, Gallinula) PFEIFFER-CLEssin, Nomen- 
elator, p. 180. — (Helix) HrıparL6o, in: Journal de Conchylio- 
logie 1887, vol. 57, p. 104; Atlas, t. 16, fig. 8-10. — 
MÖLLENDORFF, Verzeichn. philipp. Landmoll., in: Abh. Ges. 
Görlitz, vol. 22, p. 87, sep. p. 62; Bericht Senckenb. Ges. 1893, 
p- 78. — PıLssry, in: Tryon, Manual, ser. 2, vol. VJ, p. 225, 
t. 56, fig. 77—79. 
Ziemlich weit verbreitet: Siquijor, Cebu, Bohol, Camotes, Leyte, Mindanao, Visajas. 
Sie hält die typischen Kennzeichen merkwürdig fest, so dass Unterarten nicht zu unter- 
scheiden sind. 
