PLATE 71. 



Pis* 



Fig. 1 & 5. Orthoceras lonqicameratum. 34S 



1. A fragment of a large specimen preserving a part of the outer chamber, with about four- 

 teen of the first chambers. 



5. A longitudinal section of a specimen, apparently of the same species, the septa being pro- 

 portionally a little more distant. 



Fig. 2. Orthoceras subtextilb. 344 



2. The specimenj natural size. 



Fig. 3. Orthoceras ? Undetermined. 345 



Fig. 4. Orthoceras clavatum. 345 



i. A fragment, preserving a part of the outer chamber and several of the septa above. 



