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Show 264 MR. E. A. SMITH ON THE [Apr. 5, narrow closely costate whorls, and only two parietal lirae and the same number within the outer lip. Pfeiffer states that H. helenensis was described by Forbes in the Proc. Zool. Soc. for 1851, and this statement is copied both by Reeve and Wollaston. This appears to be an error, for after a careful search I have been unable to discover in any publication the description by Forbes of any species of Helix under that name. 12. PATULA MINUTISSIMA, sp. nov. (Plate XXL figs. 9-9 c.) Testa conoidea-depressa, mediocriter late umbilieata, albo et rufo maculata e£ variegata ; spira leviter elevata, superne obtusa ; anfractus 7, primi duo Iceves, pallide rufescentes, cceteri convexiusculi, lirulis tenuibus arcuatis obliquis, in anfr. ult. fexuosis, ornati, ultimus ad peripheriam acute rotundatus, vel interdum obsolete subangulatus, antice haud descendens; apertura oblique semilunala ; lamellceparietales.tenuissimce, in cochleis adultis sex, in exemplis juvenilioribus quatuor vel quinque ; plicce palatales 8-10; peristoma tenue, margine columellari expanso. Diam. mag. 4\ millim., min. 4|, alt. 2\. Hab. Sugarloaf Ridge (Turton). Extinct. This species is smaller than P. polyodon, more narrowly umbili-cated, has fewer whorls, coarser and more remote striae, and a different armature within the aperture. In full-grown shells there are as many as six parietal lirse, as it were, in two groups of three. They are very fine and extend a long way within. The plica? within the outer lip vary apparently from seven or eight to ten or eleven, and some of them are more prominent than others. The red markings take the form of radiating blotches on the upper surface, and more undulating or zigzag streaks beneath. 13. PATULA LEPTALEA, sp. nov.1 (Plate XXI. figs. 10-10 e.) Testa orbicularis, depressa, late umbilieata, albida rufo variegata; spira vix elevata ; anfractus 5,primi 1| Iceves, cceteri convexiusculi, tenuissime arcuatim striati, lente accrescentes, ultimus ad peripheriam acute rotundatus, antice haud descendens; apertura oblique semi-Junata; lamellce parietales tres (quarum suprema et mediana duplices sunt) tenues, lonye intrantes ; plicce palatales circa sex. Diam. maj. 3| millim., min. 3, alt. lj. Hab. Sugarloaf Quarry (Turton). Extinct. This species is much smaller than P. polyodon and not quite so large as P. minutissima ; it is flatter than either, much more finely striated than the latter, and has a different oral armature from both. The parietal liras are unequal in size, that nearest the collumella being the smallest. The two others are about equal and double, and between occasionally a very small and slender intermediate lira is observable. 1 \67rra\eos, delicate. |