844 
80. Cyclotus (Opisthoporus) iris G. Austen. 
Taf. 125. Fig. 10—12. 
Testa aperte et perspectiviter umbilicata, depressa, ochraceo-fusca, strigis fulminulatis 
castaneis supra undique ornata, vix subtilissime striatula, haud nitens. Spira plana, apice 
vix super anfractum ultimum prominente; sutura profunde impressa. Anfractus 4—4 l / 2 con- 
vexi, superi lente, inferi rapide accrescentes, ultimus antice valde et celeriter descendens» 
demum solutus, dilatatus, tubulo suturali horizontali, recto, antrorsum directo munitus. 
Apertura obliqua, lata, subcircularis ; peristoma duplex, albido-fuscescens; internum continuum, 
haud vel vix productum, externum nisi ad columellam late expansum, campanulatim reflexum, 
versus insertionem auriculam latam medio impressam formans. 
Diam. maj. 19, min. 15,5, ult. 16, diam. apert. cum perist. 9,5 mm. 
Rhiostoma iris God win- Austen *), Land-Shells Borneo, in: Pr. zool. Soc. London 
1889 p. 343. — (Opisthoporus) Kobelt & Moellendorff, Catalog 
Pneum., in: Nachrbl. D. malak. Ges. 1897 vol. 29 p. 118. — 
(0.) Kobelt, Cyclophoridae, in: Tierreich, Heft 16 p. 215. 
Aufenthalt auf Borneo, jedenfalls nicht weit von dem Fundort der anderen nord- 
borneensischen Arten; Abbildung und Beschreibung nach einem Exemplar in Moellen- 
dorffs Sammlung. 
Ausser dem abgebildeten Stück, das ein wenig grösser ist als Austens Typus, 
liegt in derselben Glasröhre noch eine kleinere Form von nur 16 mm Durch- 
messer, sonst völlig übereinstimmend. 
81. Cyclotus (Opisthoporus) hungerfordi G. Austen. 
Taf. 125. Fig. 13—15. 
Testa depressa, fere discoidea, saturate fusca maculis triangularibus inanfratibus superis 
ornata. Spira plana, apice mamillari vix prominulo; sutura impressa. Anfractus 4V 2 con- 
*j Shell depressedly tnrbiDate, openly and perspectively umbilicated, coloor deep ocbre, with regulär 
zigzag bands of ruddy brown crossiDg the whorls; spira jost raised above the last whorl: apexblnnt; sutnre 
well impressed; whorls 4 ronnded, the last separated from the pennltimate for about 5 mm from the aper- 
ture, where the sutural tube raises; this is short, horizontal and directed forward. Aperture oblique; peri- 
stome double, continuous, inner simple, outer expanded at right angles to the body whorl, more particnlarly 
on the outer margin, and increasing to a wrinkled expansion or wing ou the upper margin and directly in 
front of the sutural tube ; this wing terminates abruptly on the columellar side. Operculum with a smooth 
central spot, mnltispiral, shelly, flatly convave. — G. Austen. — Diam. maj. 18,25, min. 14, alt. axis 5,75 mm. 
