MARINE UNIVALVES 



155 



This fine, large shell is marked with sharp, fine 

 grooves which run around it spirally. The lip is 

 reddish-yellow in color, or sometimes brown. It is 

 a fine, shapely shell, and it reaches a length of i lo 

 millimeters. 



Figure 136 shows 

 the largest shell of 

 all, its length reach- 

 ing the remarkable 

 extent of 137 mm., 

 while it is 75 mm. 

 in breadth. This 

 splendid shell is 

 named Strojnbella 

 melonis^ Dall, the 

 Melon Strombella. 

 Although so large 

 the shell is not very 

 heavy, for it is quite 

 thin, like most of 

 the true Melon- 

 shells. Its shape is 

 well shown in the 

 picture, and its color 

 is pinkish, or yellow and white. 



^ritonofusus rectirostris^ Cpr., the Straight- 

 beaked Spindle-shell is shown in Figure 137. The 

 picture is considerably magnified, but it represents 

 the features of the shell very closely. The shell 

 itself is white, but it has a polished, olive-brown 

 epidermis. It lives in the waters of Puget Sound 

 and vicinity. 



Fig. 136, X 3 (*) 



