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Show 1895.J BOEXEO AND NEIGHBOURING ISLANDS. Ill 31. SITALA BUSAUENSIS. (Plate III. fig. 9.) Testa anguste perforata, conica, ad peripheriam carinata, dilute fusco-cornea; anfractus 6, convexiusculi, liris obliquis tenuissimis confertis arcuatis, sutura carinata sejuncti, ultimus infra carinam paulum convexus, nitidior, concentrice tenuiter striatus apertura parva; columella rectiuscula, leviter incrassata et reflexa. Diam. maj. 3'5 millim., alt. 3*7. Hab. Busau, Sarawak. The distinguishing features of this species are tbe well-marked fine oblique lirations upon tbe upper surface and the concentric stria? of the base. In form it is very like S. angulata, Issel. 32. SITALA CAEA. (Plate III. fig. 10.) Testa trochoidea, anguste perforata, tenuis, cornea, subpellucida, carinata ; spira conica, ad apicem obtusiuscula; anfractus 6, convexi, lineis incrementi tenuissimis obliquis sculpti, accrescentes, ultimus infra carinam leviter convexus, striis minutis ornatus ; apertura parva, lunata, vix obliqua peristoma tenue, margine columellari elective paulo reflexo, haud incrassato. Diam. maj. 3*3 millim., alt. 3*2. Hab. Gomanton, N.E. Borneo. Very like S. angulata, Issel, but rather higher in proportion to the width, and without spiral stria? upon the spire. 33. SITALA DULCIS. (Plate III. fig. 11.) Testa depresse turbinata, minute perforata, hiud carinata, fusco-cornea, sericata, striis incrementi obliquis aliisque spiralibus microscopice cancellata; spira brevis, convexa, obtusa; anfractus 4|, p>erconvexi, sutura profunda sejuncti, ultimus ad peripheriam acute rotundatus vel vix subangulatus, inferne concentrice striatus; apertura lunata, vix obliqua ; peristoma tenue, margine columellari arcuato, superne dilatato et reflexo. Diam. maj. 2'h millim., alt. vix 2. Hab. Gomanton, N.E. Borneo. In comparison with the other Bornean Sitalce, the present species is less conical. It is allied to S. orchis, Godwin-Austen, but much more finely striated. 34. SITALA ACCEPTA. (Plate III. fig. 12.) Testa angustissime perforata, rotunde conica, ad peripheriam carinata, cornea, subpellucida, lineis spiralibus microscopicis incrementique tenuissimis decussata; spira convexe conoidea, superne obtusa; anfractus 5-5|, convexi, lente accrescentes, sutura carinata profunda discreti, ultimus infra carinam gracil-limapaulo convexus, concentrice striatus ; apertura parva, irregulariter lunata, vix obliqua ; peristoma tenuo^ margine columellari valde incrassato subreflexo, perpendiculari cum basali angulum levem fo rmante. |
