PLATE III. 



Ziphius anyustus. 



Fig. 



1. Side view of basal portion of rostrum. 



2. I'pper view of ditto. 



2*. Outline of transverse section of ditto at the part marked * in fig. 2. 



Ziphius gibbm. 

 Side view of basal portion of rostrum, 

 .'i*. Outline of transverse section at the part marked * in tig. 3 (upside down). 



Fossils, from the Red Crag of Suffolk. In the British Museum. 



