OCR Text |
Show 1888.J MR. G. B. SOWERBY ON NEW SPECIES OF SHELLS. 211 They were too imperfect satisfactorily to describe. Mr. Bairstow has now sent me a specimen in very fair condition, which, though not absolutely perfect, shows all the essential characters of the species. PLEUROTOMA BULOWI, sp. nov. (Plate XI. fig. 16.) P. testa elongato-fusiformi, utrinque attenuata, pura alba. Anfractus 13, primi 2 rotunde convexi, polili; cceteri acute carinati, ubique dense spiraliter lirati; spnra acutissima. Anfractus ultimus leviter convexus, ad basin valde contractus et multo productus. Apertura ovata, sinu elongato, angusto ernar-ginata ; canali gracili, elongato. Long. 35, maj. diam. 10. Hab. China Sea. A pure white, keeled, and closely ridged species of the typical form of P. babylonica. TURRITELLA ROBUSTA, sp. nov. (Plate XI. fig. 18.) T. testa carta, solida, albida; anfractus 10, modice accrcscentes, convexi, rotundati, spiraliter regulariter 7 lirati; liris acutis; sutura impressa ; anfr. ultimus subventricosus, rotundatus, liris 16, ad basin minoribus. Apertura subcircularis; peristoma crenulata ; columella percrassa. Long. 29, maj. diurn. 13, upert. long. 6k, lat. 6 millim. Hub. ? A remarkably short, solid, sharply lirate species. Specimen at present unique. CASSIS CERNICA, sp. nov. (Plate XI. fig. 19.) C. testa ovato-oblonga, la>vis, polita, fulvescente lactea; maculis fuscis pallidiusculis, oblongo-quadratis, sex-fasciatim dispositis picta. Spira elata, ad apicem acutiuscula, fusca; sutura impressa; anfractus 6, convexi, rotundati; ultimus elongatus. Apertura oblonga; fauce Icevi; labrum arcuatum, mediocriter incrassatum, antice dentatum; margine externo leviter reflexo, fusco vivide notato ; columella callosa, polita, basin versus plicata. Long. 32, maj. lat. 17 millim. Hab. Mauritius. Among several specimens of this pretty little species recently received from Mauritius there is some variation in form, one or two of them being stouter than the type. The smallest specimen is 23 millim, in length. There is but little variation in the colouring. HELIX BOXALLI, sp. nov. (Plate XI. fig. 13.) II. testa globoso-depressa, anguste sed profunde umbilicata, fusca, fascia nigra pallida marginata ad peripheriam cincta; spira depressa; anfractus 5|, primi 2| rotunde convexi, politi; ca:teri planato-convexi, granulis minutis, aculeatis, et pilis erectis regulariter et dense scabrati; sutura impressa; anfr. ultimus subacute angulatus, supra angulum planato-convexus, infra sub-inflatus. Apertura latiuscula, subrotundata, vix obliqua, intus |