142 WEST COAST SHELLS 



thorough cleansing of the shell is indispensable, and 

 should be attended to as soon as possible after the 

 specimens are gathered. 



OUvella pedroana, Conr., the Pedro Olive- 

 shell, has a more slender shell than that of 

 the last species, though some specimens are a 

 little more robust than is indicated by Figure 



Fig. 113 , ... 



1 13. The lip is thin, the spire quite tapering, 

 while the color is generally brownish or bluish. This 

 shell, which used to be called 0. haetica, is sparingly 

 found all along the coast. 



OUvella intorta^ Cpr., the Twisted Olive-shell, has 

 a small, oval shell, more compact than that ot the 

 last species. The spire is elevated, and the suture is 

 very distinct. There is a large callus on the upper 

 part of the inner lip, and there is but one distinct 

 fold on the columella, instead of two. There are 

 generally more or less yellow stripes on the surface ot 

 the shell, the greater portion of which is light-col- 

 ored. The outer lip is more curved at the base than 

 that of the last species. 



A pure white little shell is often found 

 washed up on sandy beaches, where it is 

 found by the children and esteemed quite 

 a prize. An enlarged picture is given in j^,. ^^^ 

 Figure 1 14. The little cross beside the 

 picture indicates the true length and breadth of a 

 large specimen. Its name is Marginella jewettii^ 

 Cpr., though we will call it the California Rice-shell. 

 The spire is very short, and there are several folds or 

 plaits on the columella. The true Rice-shell of the 

 dealers, which is a little white OUvella^ pointed at 



