PLATE II. 



Fig. 13. Ranella Mathewsonii. Natural size. 8 



Fig. 14. Cuma biplicata. Natural size. 9 



Fig. 15. Ancillaria Fishii. Natural size. 9 



Fig. 16. Columbella Richthofeni. Magnified. 10 



Fig. 17. Nevkrita callosa. Natural size. 10 

 View of the base. 

 17 a. Side view to show the form of the callus. 

 17 b. Top view. 



Fig. 18. Cancellaria (Euclia) tritonidea. Natural size. 11 



C. (E) Vetusta. 12 

 Magnified to nearly twice natural length. 



Bittuim asperum. Magnified. 12 



Malania Taylori. Natural size. 13 



Lithasia antiqua. Magnified. 13 



Littorina Remondit. Magnified. 14 



23, 23 a. Two extreme forms of a variable species. 



Fig. 24. Turritella Hoffmannii Natural size. 14 



Fig. 25. Trochita filosa. Natural size. 15 



25 a. Side view. 



