164 



WEST COAST SHELLS 



Columhella aurantiaca^ Dall, the Gol- 

 den Dove-shell, a greatly magnified view 

 of which is shown in Figure i ^o, was 

 found at Monterey many years ago by 

 Dr. Dall, who gave it the above name. 

 It is really a tiny shell, only 5 mm. in 

 Fig. 150, X \ (*) length, and it varies in the color of its 

 translucent shell from orange to brown. 

 It sometimes has zigzag brown markings. It should 

 be sought for among the rocks at low water. 



Coluinhella tuherosa^ Cpr., the Tuberculated 

 Dove-shell, is another similar species. The shell, 

 however, has a very slender spire, and the body- 

 whorl is angulated. The inside of the outer lip bears 

 a row of little tubercles. The color is brown, and 

 the length is about a quarter of an inch. It is said 

 to exist sparingly all along the coast. 



Columhella chrysalloidea, Cpr., is the Chrysalis 

 Dove-shell. This is a southern species, having a 

 somewhat cylindrical shell like the chrysalis of an 

 insect. There are six whorls, very slightly convex, 

 while the surface is marked with delicate spiral 

 ridges and furrows. The spiral or- 

 namentation is prominent on the 

 lower part of the columella. The 

 length is eight millimeters. 



Colu?nbella permodesta^ Dall, 

 the Modest Dove-shell, is shown 

 in a magnified form in Figure 151. 

 The shell of this species is thin and 

 polished, of a bluish white color, 

 and it is covered with a pale, yel- Fig. 151. x \ (*) 



