PLATE XXII. 



Terebratula robusta (page 163). 



Figure 1. View of a rather narrowly elongated form of this species, showing 

 the whole of the dorsal valve and part of the ventral. 



Figure la. Profile view of the same specimen, in outline only. 



Figure 16. Front view of the same, also in outline only, to show the slight 

 mesial fold and sinus. 



Figure 2. View of a comparatively broad and short form of the species, 

 shewing the whole of the dorsal valve and part of the ventral. 



Lima p£robliqtia (page 165). 



Figure 3. Side view of the most perfect specimen (a cast of the interior of a 



left valve) yet collected. 

 Figure 3a. Fragment of a left valve with part of the test preserved, to shew 



the surface ornamentation. 



