Explanation of Plate 14 



Figs. 1-6. — Neptunea ventricosa (Gmelin): 1, a "ventricose" form from 120 feet (Sept. 15, 

 1948), with flat whorls, showing the two carinae and the cylindrical nucleus; 2, from 

 420 feet, shown with its operculum; 3, a long-spired form (USNM 606148) from 420 

 feet, with inconspicuous carinae and with lamellose projections on the last whorl; 

 4, a slender form (USXM 606150) from 453 feet; 5, a nodulous form (USXM 606149) 

 from 341 feet, with evanescing carinae and more convex whorls; 6, a young specimen 

 (USNM 606151) from 152 feet. 



Figs. 7-10. — Neptunea jniddendorffiana, new name: 7, aboral view of paratype (USXM 

 606142) from 420 feet, a form in which the carina is nearer the posterior end of the 

 whorl; 8, oral view of holotype (USXM 602694) from 175 feet, with the carina 

 nearer the anterior end of the whorl (shown with its operculum); 9, young speci- 

 men (USXM 606132) from 120 feet (Aug. 8, 1949); 10, a nodulous specimen (USXM 

 602688) from 125 feet, with the carina in the middle of the whorls, and with near- 

 lamcllose ridges on the last whorl. 



Magnification: All X .75. 



