174 



WEST COAST SHELLS 



Fig. 163 



Figure 163 gives a fairly good idea of the 

 most common species of this genus, namely, 

 Ocinebra lurida^ Midd., the Lurid Ocinebra. 

 This pretty little shell is common at Monte- 

 rey and at other parts of the coast. It is 

 spindle-shaped in outline, quite strong and 

 thick for so small a shell, and is distinctly marked 

 with fine spiral grooves. The aperture is oval, the 

 canal sometimes open and sometimes tubiform. 

 While the spiral lines are prominent, the transverse 

 sculpturing is faint. The color is recidish-yellow, 

 though sometimes it is nearly white. At low tide I 

 have found living specimens, the size of the figure 

 clinging to stones. 



The southern form of this spe- 

 cies, known as variety ?fiunda. 



Fig. 165. X \ 



Fig. 164. X I (*) 



Cpr., shown in Figure 164, 

 which is much enlarged, has 

 low, rounded, transverse ribs, 

 not varying from suture to 

 suture. It is also marked 

 with regular spiral lines. Its 

 length is 16 mm. 



