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 promiüente; sutura profunde impressa. Anfractus 4 — l*/« 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 continuumi 

 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 Godwin-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- 

 bomeensischen Arten; Abbildung und Beschreibung nach einem Exemplar in Moellen- 

 doriFs 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 in anfratibus superis 

 ornata. Spira plana, apice mamillari vix prominulo; sutura impressa. Anfractus 41/2 con- 



*) Shell depreBsedly tnrbinate, openly and perspectively nmbilicated, colonr deep ochre, with regalar 

 zigzag bands of rnddy brown crossiog the wborh; epira jast raised above the last whorl : apexblant; sotnre 

 well impresBed; whorls 4 ronnded, the last separated from the pennltimate for abont 5 mm from the aper- 

 tnre, vhere the ßntnral tnbe raises; this is shoit, horizontal and directed forward. Apertnre obliqne; peri- 

 stome dooble, eontinnons, inner simple, onter ezpanded at right angles to the body whorl, more particalarly 

 OD the oater margin, and increasing to a wrinkled ezpansion or wing on the npper margin and directly in 

 front of the sntoral tnbe ; this wing terminates abrnptly on the colnmellar side. Opercnlum with a smooth 

 central spot, mnltispiral, sheJly, flatly convave. — G. Austen. — Diam. maj. 18,26, min. 14, alt. axis 5,75 mm. 



