OLIVELLA. 65 



bauds, in fine specimens, give rise to or break n\^ into fascicles 

 of brown stripes, wliich ai-e either short, or connected in a zig- 

 zag manner over the body-whorl. Length, 10 mill. 



Soutli Carolina to Brazil. 



Ordinarily- the distinction of form and coloring serves perfectly 

 to distinguish this from the typical form, yet there occur, although 

 not plentifully, intermediate shells. The stump}^ shape of 0. 

 nitidula is accompanied by a heavy deposit of callus on the colu- 

 mella, which does not occur in the typical form : very probably 

 this difference in growth is due to the surroundings of the mollusk. 

 There is great variation in the development of denticles upon 

 the columella in both forms, these being few or obsolete in some 

 specimens and very numei'ous in others, occupying nearly the 

 whole length of the inner lip. The following appear to be syno- 

 nyms of the variety' : O. zigzag, DwgXo^ (figs. 50,51), O.fimhriata, 

 Reeve (fig. 52), 0. miciila, Marrat (fig. 53), 0. miliola^ d'Orb. 

 (fig. 54), which appears to be the young, and 0. atrigata, Reeve 

 (fig. 55). 



O. MANDARiNA, Duclos. PL 14, figs. 56, 51. 



Spire rather elevated, inner lip with a strong callous deposit 

 above, extending upwards to the spire ; yellowish white, painted 

 with zigzag longitudinal brown stripes, sometimes spotted or 



fasciculated below the suture. Length, 10 mill. 



China. 



I am not acquainted with this species ; it appears to be nearly 

 allied to the preceding, but oi more solid build. The locality 

 has not been confirmed, and the more recent monographs have 

 simply copied Duclos. 0. Tunguina, Duclos (fig. 5t), is evidently 

 a synonym, but Marrat has erroneously identified with it a 

 specimen of the typical 0. mutica. 



O. ROSALINA, Duclos. PI. 14, figs. 58-60. 



Shell flesh-color with distant zigzag brown markings ; colu- 

 mella tinged with rose-color. Length, 1 mill. 



West Indies. 



I am unacquainted with this species, which, except in its 

 columella being colored, does not seem to differ from 0. Verreauxi, 

 Ducros. 0. Sowerb}/i, Ducros (fig. 59), and 0. Volutelloides , 

 Marrat (fig. 60), are synonyms. 

 9 



