PLATE III. 



Orthoceras Nolani, .4. E. Foord. 



Figs. 1 rt, 1 5, 1 f . A large specimen covered with tbe test, tlie figure divided 

 into three portions to avoid the necessit}' of reducing it. 1 d . Longitudinal sec- 

 tion of the same. 1 e. Longitudinal section of another individual. 1 /. Trans- 

 verse section of the same along the longer diameter, and showing the excentric 

 siphuncle. Clane. Dublin IMuseum of Science and Art. (Page 4.) 



