Tzventy-five Nezv Species of Marine Shells. 59 



circuniainbiente, apertui'd oblongd, labro simplice, coliivielld 

 spiraliter iiniplicatd. 



Long. 4 mill. 



Lat. I 20 „ 



Hub. Bombay {Abercrovibie). 



An attenuate shining white fusiform little species, allied 

 to A. virgo (Adams), from Japan ; the mouth is oblong, 

 columella strong, spirally plaited. The whorls are turreted, 

 smooth, semi-pellucid, with the internal plica showing 

 through as a transverse clouded line just below the sutures. 

 Two or three specimens only. 



OSCILLA TORN ATA, Sp. IIOV. (PI. I, f 12.) 

 \Oscilla tornata, Arthur Adams MSS. inedit.] 



O. testd fnsifor7fii, albidd, anfractibus septevi, apud 

 suturas profundi canaliculatis, transversirn tricostatis, cosiis 

 binis infra suturas, parvo sulculo intercepto, tertid costd ab 

 his a canali profmidd divisd, sicut apud suturas, aperturd 

 ovatdy albidd, subpelhicente, labro externo sulculoso, extus et 

 intus, columellari conspicue et recte uniplicato. 



Long. 3"io mill. {sp. majoris). 



Lat. 1-50 „ 



Hab. Bombay {Abercrombie). 



This wonderful little transversely sulcate and grooved 

 species has some external resemblance to Irazvadia troch- 

 learis (W. T. Blanford), but can be at once distinguished by 

 the plicate columella. There are four or five described 

 species of this genus, mostly of Mr. Arthur Adams' naming, 

 from Japan. In the British Museum is a specimen, also 

 from Japanese seas, with the name as above, entirely com- 

 parable with our shell. He does not seem to have ever 

 described it, as was, unfortunately, often his practice in his 

 later years, especially amongst these smaller and critical 

 genera. The consequence has been to still further render 



