1888. J MR. G. B. SOWERBY ON NEW SPECIES OF SHELLS. 21 1 



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. 



Anfraclus 13, primi 2 rotiinde coiwexi, polili ; ccsteri acute 



carinati, vbique dense spiraliter lirati ; spira acutissima. An- 

 fractus ultimus leviter convexus, ad basin vulde contractus et 



multo productus. Apertura ovata, sinu elongato, anyusto emar- 



ginuta ; canali gracili, elongato. 

 Long. 35, moj. diam. 10. 

 Hah. China Sea. 



A pure white, keeled, and closely ridged species of the typical 

 form of /'. babylonica. 



TURRITELLA ROBL'STA, Sp. UOV. (Plate XI. fig. 18.) 



T. testa curta, solida, albida ; anfractus 10, modice accrescentes, 

 convexi, rotundati, spiraliter regulariter 7 lirati; liris acutis ; 

 sutura impressa ; anfr. ultimus subvenfricosus, rotundatus, liris 

 1 G, ad basin minoribus. Apertura subcircularis ; peristoma 

 crenulata ; columella percrassa. 



Long. 29, mnj. diam. 13, upert. long. 6i, lat. G 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, Icevis, polita, falvescente lactea ; maculis 

 fuscis pallidiuscidis, 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 externa leviter reflexo, 

 fusco vivide notato y 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. Tiie smallest specimen is 

 23 millim, in length. There is but little variation in the colouring. 



Helix boxalli, sp. nov. (Plate XI. fig. 13.) 



11. testa globoso-depressa, anguste sed profunde umbilicata, fusca, 

 fascia nigra pallido tnarginata ad peripheriam cincta ; spira 

 depressa ; anfractus 5i, primi 2\ rotunde convexi, polili; 

 cccteri planato-convexi, granulis minutis, aculeatis, et pilis erectis 

 regulariter et dense scabrati ; sutura impressa ; anfr. ultimus 

 subacute angulutus, supra angulum planato-convexus, infra sub- 

 infatus. Apertura latiuscula, subrotundata, vix obliqua, intus 



