PLATE IV. 



Ziphius angulatus. 



Fig. 



1. Upper view of rostrum, wanting the end. 



2. Side view of ditto. 



2*. Outline of transverse section at the part marked * in fig. 1. 



Ziphius medilineatus. 



3. Upper view of rostrum, wanting the end. 



;i*.OutUne of transverse section of ditto at the part marked * in tig. 3. 



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



