Explanation of Plate 15 



Figs. \-7.^Neptunea heros Gray: 1, a shell from 40 feet (Eluitkak Pass, Aug. 10, 1948) 

 with a long aperture and medium spire, a strong carina and weak nodules; 2, shell from 

 same depth and locality with a long aperture and very short spire, a strong carina and 

 elongated nodules (shown with its operculum); 3, shell (washed ashore) with a long 

 aperture, a fairly long spire, a strong carina, and prominent nodules; 4, a very slender 

 form from 522 feet with a long spire, an unusually weak carina, and scarcely perceptible 

 nodules; 5, a young specimen from Eluitkak Pass, similar to Xo. 3; 6, a long-spired 

 form from 522 feet with moderately developed carina and nodules, both of which are 

 practically lacking in the last whorl; 7, shell from 741 feet, similar to No. 6, but with 

 a shorter spire and weaker nodules. 



Magnification: All X -75. 



