CHAPTER VII. 



Bad Habits of the Natica Family— I v unatia and Neve- 

 rita — The Southern Sigaretus — Lamellaria and 

 the Velvet Shell — Triforis — Dextral and Sinis- 

 tral Shells — Cerithiopsis — The White Opalia and 

 Scalaria — The Shining Eulima. 



FIGURE 25 represents the big Moon-shell, Lunatia 

 Lewisii, Gld., Lu-na'-shi-a Eew-is'-i-i. It is a repre- 

 sentative of the Natica 

 family, all the members of 

 which are distinguished by 

 their ferocious nature, and 

 might well be called Snails 

 of Prey. 



Plowing along through 

 the wet sand by means of its 

 enormous foot, it no sooner 

 reaches an unfortunate 

 clam, than the flint drill 

 which it carries in its mouth 

 Fig- 25- is stretched out and begins 



to accomplish its work of destruction. The helpless 

 clam has no means of flight from such an enemy; and 

 if its hard shell is not a sufficient protection, it is in 

 a sad case indeed. And in truth, the case is sad, for 

 the shell is no match for the drill, and when once it 

 has reached the savory meat inside, the robber makes 



