PLATE VIII. 



Sc'APHiTES suBGLOBfisus (page 52). 



riidure ]. Outlimi of the aperture of the specimen represented on plate 

 \il., fig. 3, to shew tlie maximum convexity of the shell at 

 that stage of growth. 



" la. Portion of a septum of the same specimen. The finer ramifi- 

 cations of the lohes and saddles are partly obliterated by 

 erosion. 



" L'. Side view of a snjuller Init well jjreserved specimen, to shew 

 the finer surface markings. 



" 2«. <.)utline of the aperture of the last. 



