| OCR Text |
Show 1866.] MR. H. ADAMS ON SHELLS FROM CENTRAL AFRICA. 375 HELICINA DIVERSICOLOR, mihi. M.C. H. testa globoso-turbinata, obsolete subcarinata, solida, superne subconica, inferne depresso-convexiuscula, basi albida, gradatim anfractu penultimo violaceo tincta, postquam violacea, denique rubida, apice albido, sub lente transverse plicato-rugosa, anfractu ultimo pluribus lineis spiralibus obsoletis ; spira obtusa; anfractibus quinque, pianato-convexiusculis; apertura obliqua, lunata; peristomate incrassato, modice reflexo, albo, ad columellam angulo prominente. Diam. maj. 0*23, min. 0*20, alt. 0*20 unc. Hab. Pine Mountain, Ipswich, Queensland (Masters); Pine Mountain, Lismore, Upper Richmond River (on leaves and trunks of trees) (Macgillivray). A somewhat variable shell in colour : it frequently has a dead and chalky instead of a porcellanous appearance ; and the red and violet of the spire are sometimes greenish, or bluish, or wanting altogether. The throat is occasionally reddish or yellowish instead of white. Queensland specimens are not in general so brightly coloured as Richmond River ones. PUPINA PINETICOLA, mihi. M.C. P. testa ovata, nitidissima, polita, solidiuscula, hyalina; spira obtusa ; anfractibus quinque, ultimo maximo, plusculum quam dimidium testa: arquante, proximo latitudine arquali, carteris celeriter decrescentibus ; apertura modice obliqua, fere orbicu-lari; peristomate albo, crasso reflexoque, canalibus duobus interrupto, canali superiore externoque angusto, intus plica con-cava prominente alba formato, canali altero ad medium oris externe aperto et columellam separante; operculo corneo, pauci-spirali. Long. 020, diam. 0*12, apert. 0*09 unc. Hab. Pine Mountain, Lismore, Upper Richmond River (on the ground, burrowing in dry weather) (Macgillivray). 6. List of the Shells collected by Samuel "White Baker, Esq., during his recent Explorations in Central Africa. By H E N R Y ADAMS, F.L.S. 1. LlMICOLARIA TENEBRICA, Reeve. 2. PLANORBIS, sp. ? This species was also brought by Capt. Speke from the Victoria N'yanza and White Nile, but I have not been able to ascertain whether it has been described. 3. VIVIPARA UNICOLOR, Oliv. |
