MARINE UNIVALVES 



149 



Fig. 126 (*) 



Buccinum viridum^ Dall, the 

 Green Whelk, shown in Figure 

 126, which represents it of its 

 natural size, is not a north- 

 erner, but was dredged where 

 the water was half a mile deep, 

 off the Santa Barbara Islands. 

 The shell is delicate and thin, 

 which is apt to be the case 

 with all shells which live at 

 great depths, and it is covered 

 with a fine, greenish epidermis 

 which easily falls off. The outer lip is thin and is 

 but slightly reflected. The length is 46 millimeters. 



Somewhat similar in shape 

 to the last is Chrysodo?7ius 

 amiantus^ Dall, the Unspot- 

 ted Chrysodome, shown in 

 Figure 127. This species has 

 a large, thin, white shell, with 

 a prominent nucleus at the top, 

 while it is marked with numer- 

 ous narrow revolving ridges. 

 Several specimens of this fine 

 shell were dredged near the 

 Santa Barbara Islands. 



Chrysodomus dirus^ Rve., 

 the Dark Chrysodome, Figure 

 91, was described and figured 

 on a preceding page. It 



hardly seems to deserve its ill-omened name, as there 

 is nothing direful in its appearance, though its color 



Fig. 127. X I (*) 



