232 



WEST COAST SHELLS 



Of late years, however, it has been found off San 

 Pedro, where specimens reach an altitude of over an 

 inch. The top of the growing shell is rose-colored, 

 and the rest is yellowish white, but as age advances 

 it gradually loses its brightness and appears of a 

 yellowish pink, wdth pearly iridescence showing 



through. 



Fig. 229, xU*) 



Callios to ma platinum^ 

 Dall, the White Top-shell, 

 is shown, somewhat magni- 

 hed, in Figure 229. This 

 line species was dredged by 

 the ''Albatross" expedition 

 from a depth of about half 

 a mile of water near the 

 Santa Barbara Islands. The 

 shell is large, very thin, pol- 

 ished, and of a whitish col- 

 or, tinged with green or 

 blue. 

 Figure 230 represents an- 



other rare shell dredged off the 

 the coast of southern Califor- 

 nia. Its name is Calliostoma 

 turbinum^ Dall, the Turbaned 

 Top-shell. It is a small species, 

 the shell being only 12 mm. 

 high. The body of the shell is J'S^ 

 waxen, showing nacre, and it is f^"^ ' 

 ornamented with certain small 

 fiamules of dark brown not 

 shown in the engraving. 



Fig. 230. X I (*) 



