PLATE 71. 
Page 
1 & 5. Ortiioceras longicameratum. 343 
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. 
Ortiioceras subtextiee. 344 
2. The specimen, natural size. 
3. Ortiioceras -? Undetermined. 345 
4. Ortiioceras clavatum. 345 
4. A fragment, preserving a part of the outer chamber and several of the septa above. 
