EXPLANATION OF PLATE XXXIL 



Fig. 



78. Belemnites Owenii, var. Puzostanus. From St. Neot's, presented by Mr. 



Walker ; v, ventral face, with strongly marked apicial groove reaching to the 

 point ; /, lateral view. The cross section is oval. 



79. Belemnites Ow^enii, var. Puzosianus. From St. Neot's; v, ventral aspect, 



showing an almost evanescent apicial depression ; d, dorsal aspect ; s, the cross 

 section of the alveolar region. 



80. Belemnites Owenii, var. tornatilis. From the Kelloway Rock of Hackness, 



near Scarborough; v, the ventral surface expanding anteriorly; cross section oval. 



81. Belemnites porrectus, n. s. From the Oxford Clay at Summertown, 



presented by Mr. Dawkins ; v, ventral aspect, showing a strong, sharply cut 

 apicial furrow, and its anterior extension ; cross section oval. 



