EXPLANATION OF PLATE XH. 



Belemnites Ilminstrensis, n. s. 



/. Lateral view of a fine specimen, with colour-bands, in the Collection of Mr. 

 C. Moore. 



v . Ventral aspect of another example. 



/". Lateral aspect of a larger individual. 



v" . Ventral aspect near the apex, showing a few striae. 



d" . Dorsal aspect of the same. 



d'" . Dorsal aspect (apex rather decomposed). 



v" to y'". Series of ventral aspects in young examples. 



s. Transverse aspect of a septum. 



section at the alveolar apex. 

 ,, „ toward the apex. 



„ still nearer the apex. 

 „ „ very near to the apex. 



^ . Ventral aspect of the phragmocone, from which the conotheca is removed. 

 Another example, showing the dorsal aspect, with peculiar marking ; this is 

 magnified at . 



^" . Worn specimen of phragmocone, showing the shape of the siphuncle. 



Phragmocone in situ, lateral aspect. 

 <f'. Small, twin, or grouped egg-shaped prominences on the surface of the 

 phragmocone, within the conotheca. 



