PLATE V. 



Murchisonia gracilis (page 22). 



Figure 1. Murchisonia gracilis, Hall. The cast or body-whorl a good deal 

 broken away, and shewing the inner reflected lip. 

 " la. An enlarged whorl, to shew the lines of growth and the smooth 

 band. 



Murchisonia ventricosa (page 23). 



2. M. ventricosa, Hall. Of large size. The body-whorl here is also 



broken away; hence the pillar-lip, p, and the base of the 

 whorl, b, are more prominent and curved than they should be. 

 At s a slight ridge, just above the suture, is sometimes visible. 

 2a. Shews the moderately arched lines of growth. 



3. A smaller specimen, less elongate than usual. The position of the 



band high up, near the sutures, is contrasted in this species 

 with that of M. gracilis, figure 1. 



