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Show 268 MR. E. A. SMITH ON THE [Apr. 5, iusculi, lente accrescentes, lineis incrementi tenuibus obliquis striati, ultimus antice valde ascendens,pone labrumconstrictus, scrobiculatus et distortus, inferne quoque scrobiculatus, ad anfractumpenultimum appressus; spira ad apicem valde obtusa; apertura transversim ovata, superne sinu fere circulari instructa, intus anguslata; perist. continuum plus minus expansum. Longit. 1| millim., diam. may. 1%, min. 1; apertura \ long a, \ lata. Hab. Side Path, and the sinistral form from Sugarloaf Ridge (Turton). Extinct. This is a very remarkable little species and quite unlike any other from the island. The manner in which the last whorl ascends in front upon the penultimate recalls certain species of Tomigerus and Boysia. The emargination at the upper part of the peristome is most remarkable. It has the appearance of being the termination of a tube, the edge of which is notched at one place. The shallow depression on the lower part of the body-whorl towards the aperture and the more distinct groove behind the peristome give the last volution a decidedly distorted appearance. It is difficult to decide whether this species should be classed as a Tomiyerus or a Pupa. In size it more resembles the latter genus, but in outline the former; it has not, however, the same armature to the mouth. 23. PUPA TURTONI, sp. nov. (Plate XXII. figs. 20, 20 a.) Testa minuta, cylindracea, superne obtuse conoidea, albida, sub-rimata; anfractus 5-6, convexi, lente erescentes, sutura vix obliqua sejuncti, lineis perobliquis tenuissime striati, ultimus haud descendens, pone labrum in medio uni-scrobiculatus; apertura parva, irregulariter subquadrata, longit. totius | haud cequans, intus dentibus sex (tribus parietalibus, uno columellari, duobus palatalibus) munita; peristoma niveum, leviter expansum et reflexum, continuum, superne indentatum. Longit. 3 millim., diam. 1; apertura ^ longa et lata. Hab. Sugarloaf Quarry, common (Turton). Extinct. This species might be found anywhere. It is not unlike P. soli-taria, Smith, from Fernando Noronha, but rather more cylindrical, less conical towards the apex, and has different armature to the mouth. 24. PUPA OBLIQUICOSTULATA, sp. nov. (Plate XXII. fig. 21.) Testa minuta, cylindracea,pallide fuscescens, rimata ; anfractus sex, convexiusculi, sutura profunda sejuncti, costulis arcuatis tenuibus perobliquis ornati, ultimus antice leviter contractus, paulo ascendens, pone labrum haud profunde impressus; apertura rotunda, subquadrata, longit. totius g adcequans, intus haud dentata; peristoma tenue, undique anguste expansum, marginibus superne conniventibus. Longit. 2 millim., diam. f ; apertura § longa, | lata. |