150 Mr. G. B. Sowerby on the 



forms a regular canal at the upper as well as lower extremity. The very 

 young shell is slightly transversely striated, its surface is duller, its outer 

 lip is sharp-edged, and not inflected ; as it increases, the outer lip be- 

 comes thickened and turned inwards ; and the shell attains its brilliant 

 polish : the colour of the inside also strengthens with age ; the very 

 young shell being colourless. A dwarf variety occurs, which is less than 

 an inch and a half long, and which has an irregular cicatrix at the back 

 of each produced end. 



OvuLUM Margarita. 



0. testd ovalisubglobosd, supernk obtusd, infrd subacuminatd, albd r 

 columelld intiis prope basin depressO'Concavd ; labii externi margine 

 rotuTidato, intiis denticulato ; long, fi, laU y*^, poll. 

 Licium Margarita. G. Humphrey, MS. ined. 

 Hab. in Insulis quas " Friendly'* vocamus, in Mari Pacifico. 



Desc. Shell oval, nearly globular ; obtuse at the upper end, and 

 slightly acuminated at the lower ; perfectly white ; lower part of the 

 columella depresso-concave within ; edge of the outer lip rounded, den- 

 ticulated within ; canals very short, the upper one turned to the left 



Received from the Friendly Islands by Mr. G. Humphrey ; all the 

 specimens in his possession, one only excepted, were pierced and strung 

 by the natives. 



OvuLUM Adriaticum. 



^. testd oblongo^ovali, subventricosd, utrinque subacumincUd, pallide^ 

 earned, hyalind ; labii externi margins angusto, intiis denticulato ; 

 columelld supernh uniplicatd, infrd subdepressd, inths mxirgiruttd ; 

 long. -j9^, lat. tV> poU- 

 Hab, in mari Adriatico ; communicavit Dr. Goodall. 



Desc. Shell oblong-oval, rather ventricose ; somewhat acuminated 

 at both extremities, pale flesh colour, hyaline ; margin of the outer lip 

 narrow, denticulated on the inside : upper end of the columella with one 

 oblique plait ; lower end somewhat flattened, with a thickened internal 

 margin. 



I found one specimen of this in G. Humphrey's collection, another was 



