148 



WEST COAST SHELLS 



Fig. 124 (*) 



Fig. 125. X i (*) 



three ridges, which is known 

 as var. tricarinatum^ Dall. 

 Both shells have a translucent 

 brown outer coat, and are 

 marked with fine spiral lines 

 of sculpture. 



Buccinum plectrum^ Stimp- 

 son, the Lyre Whelk, is shown 

 in Figure 12^. This shell is 

 distinguished by ridges, which 

 suggest the second name, on 

 account of their resemblance 

 to the strings of a musical in- 

 strument. This species, which 

 is not very common, is also 

 found on the shores of Bering 

 Sea. 



