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Show 634 MR. E. A. SMITH ON LAND AND FRESHWATER [Nov. 7, indentatus; apertura irregularis, longit. totius -f^ subcequans, dentibus quinque albis (uno parietali lamelliformi valde uno columellari crasso ceque prominente, tertio infra minimo, quarto et quinto intra labrum sitis, bidentato) munita ; peristoma album, leviter expansum et Longit. 8f- millim., diam. 4; apertura 2\ longa. Hab. Karonga, west shore of Lake Nyasa (R. Crawshay). This species exhibits scarcely any trace of sculpture. The indentation on the body-whorl behind the lip indicates the position of the labral teeth. The upper one of these is planted somewhat obliquely and is distinctly bipartite. The parietal lamella is thin, hollowed out or concave on the right side or towards the labrum, which it practically touches at the upper extremity. 3. HELIX (PELLA) WHYTEI. (Plate LIX. figs. 3, 4.) Testa depresse globosa, anguste perforata, tenuis, flavo-superne vix nitida, infra polita; anfractus 5|, subceleriter crescentes, convexi, lineis incrementi oblique arcuatis spira brevis, conica, ad apicem subobtusa; anfr. ultimus magnus, ad peripheriam rotundatus; apertura late lunaris, parum obliqua ; sutura mediocriter profunda, anguste marginata peristoma undique tenue, supra umbilicum breviter reflexum. Biam. maj. 20 millim., min. 16|; alt. 13. Hab. Fort Johnston, tipper Shire River. (Collected by Mr. A. Whyte.) Allied to Pella amotti, Benson, but more globose and without the minute spiral striation on the upper surface. All the specimens, about thirty, have been collected without the living animal, and in this condition most of them have the spire more or less bleached. In addition to the lines of growth, occasionally a few spiral lineations are observable, and a few small malleations or indentations make the upper surface more or less uneven. 4. LIVINHACIA NILOTICA, Pfeiffer. Hab. Angoni-Land, south-west of Lake Nyasa (A. Whyte): Itawa, west of Lake Tanganyika (R. Crawshay). This species has a wide range, extending from the White Nde district along the lake-region as far south as the southern end of Nyasa, a distance of from fifteen to eighteen hundred miles. It varies considerably in form. 5. BULIMINUS (RACHIS) STICTUS, Martens. Hab. Angoni-Land (A. Whyte). Tette, Mozambique (Martens). A single typical example. 6. LIMIOOLARIA MARTENSIANA, Smith. Hab. Sumbu, Itawa, S.W. of Tanganyika (R. Crawshay). |
