SECTION V* 115 



The Turban otCIavicle (Clavicula) is the 

 aggregate, or whole fet of the whirls, and 

 always forms the lower part of the Shell. 

 See PI. I. fig. 3, 4j and 7. c. c, c. 



A flat or helix turban (clavicula helix) 

 is one fo flightlj prominent as to be near 

 on a level, as PI. V. fig. 7^ 9. The fliorc 

 turban (clavicula deprefla) as PI. V. fig* 

 3,4, 8. The produced turban (clavicula 

 longiore) as Plate I. fig. 3, 4. PL III. fig. 

 12, 13. PL V. fig. I) 2, &:c. The long 

 turban (clavicula longifiima) as PL III. fig* 

 9. PI. IV. fig. 4 and 7, are explained by 

 the very names or terms* 



The Pillar (Columella) is the middle 

 part, or axis, which runs through the 

 Shell its length, or from top to bottom, 

 and from which all the fpires commence 

 and turn round, and is the fupport or 

 bafis of them. It always lies afide the 

 mouth, and though not ktw in all the 

 Shells, yet in many it is the moll: obvious 

 part of the mouth, after the lip. See PLL 

 fig. 5. d. d. dt, la Th« 



