264 MB. E. A. SMITH ON THE [Apr. 5, 



narrow closely costate whorls, and only two parietal lirse 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 Eeeve and "Wollaston. Tliis appears to 

 be an error, for after a careful search I liave 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 XXI. figs. 9-9 c.) 



Testa conoidea-depressa, mediocriter lateumhilicata, alho et rufo 

 maculata et variegata ; spira leviter elevata, superne oltusa ; 

 anfractus 7, primi duo Jeeves, pallide rufescentes, cceteri 

 convexiuscttli, lirulis tenuihus arcuatis obliquis, in anfr. ult. 

 flexuosis, ornati, ultimus ad peripheriam acute rotundatus, 

 vel interdum obsolete sulangulatus, antice Jiaud descendens ; 

 apertura oblique semilunata ; lamellae parietales tenuissim<e, 

 in cochleis adtiltis sex, in exemplis juvenilioribus quatuor vel 

 quinque; plicae palatales 8-10; peristoma tenue, marqine 

 columellari expanso. 

 Diam. maj. 4|- ■millim., min. 4|, alt. 2\. 

 Hab. Sugarloaf Ridge {Turton). Extinct. 



This species is smaller than P. polyodon, more narrowly umhili- 

 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 plicse 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,^ (Plate XXI. figs. 10-10 c.) 



Testa orbicularis, depressa, late umbiUcata,albida rufo variegata; 

 spira vix elevata ; anfractus 5, primi Ig leBves, cceteri convex- 

 iusculi, tenuissime arcuatim striati,lente accrescentes, ultimus 

 ad peripheriam acute rotundatus, antice Tiaud descendens ; 

 apertura oblique semi-lunata ; lamellae parietales tres 

 {quarum siiprema et mediana duplices sunt) tenues, longe 

 intrant es ; plicce palatales circa sex. 

 Diam. maj. 85 millim., min. 3, alt. I3. 

 Hab. Sugarloaf Quarry (21m?'/o?«). 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 lirse 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. 



' XeirroKeoi, delicate. 



