EXPLANAl'lON OF PLATE 
PLATE I, 
1. Dentalhim jranciseiise, Verco. 
1a. Dentalnim jrancisense^ Verco, young. 
2. Dcfilciliiim hemileiiro-n, Verco. 
3. Dentalimn hyperhe-mile%iron, \ erco. 
3a. Dentalium hyperhemileuron, Verco, early stage. 
4. DeiitaUum hbricatum, Sowerby, early stage. 
4a. DentaVmm lubrlcatuvi, Sowerby, apex. 
5. (^aduhis aih^ustior, Verco. 
5a. Cadulus any/ustior, Verco, initial stage. 
5b. Cadulus angustior, \'erco, medium stage. 
6. Cadulus gibbosus, Verco. 
7. Cadulus occiduus, Verco. 
