PLATE XXIV. 



r a g e 

 Fig. 1. Pleurotomaria ohesterensis, M. and W 303 



1 a. Side view, showing the form of the aperture, spire, etc. 



1 b. View of the opposite side. 



1 c. Enlargement of surface markings. 



Fig. 2. Strap arollus planodorsatus, M. and W 302 



2 a. View of upper side. 



2 b. Outline profile, showing the form of the aperture, spire, etc. 



2 c. Under side of a smaller specimen, showing the umbilicus. 



Fig. 3. Orthooeeas annulato-oostatum, M. and W 304 



3 v o. Side view of an imperfect specimen. 



3 b. Dorsal or ventral view of the same. 



Fig. 4. Nautilus ohesterensis, M. and W 306 



4 a. Dorsal view. 



4 b. Side view, showing the size of the umbilicus in the cast. 



Fig. 5. Nautilus globatus, Sowerby ? 305 



5 a. Lateral view, showing the size of the umbilicus in the cast. 



5 b. Dorsal view, showing the outline of the lip, the sinus of which is not 

 quite deep enough in the engraving. 



