Plate 13. 



Page. 

 Fig. 1. Dentalium liodon alloschismum Pilsbry and Sharp. Detail of apical por- 

 tion from original figure 77 



2. Dentalium sowerbyi Guilding. 11 mm 79 



3. Dentalium sowerbyi Guilding. 12 mm 79 



4. Dentalium liodon alloschismum Pilsbry and Sharp. Detail of apical por- 



tion; copy of original figure 77 



5. Dentalium liodon alloschismum Pilsbry and Sharp. Type. Copy of 



original figure 77 



6. Dentalium liodon alloschismum Pilsbry and Sharp. Type. Copy of 



original figure 77 



7. Dentalium sowerbyi pelliceri, new subspecies. Greatly enlarged 80 



8. Dentalium sowerbyi pelliceri, new subspecies. 14.5 mm 80 



9. Dentalium sowerbyi pelliceri, new subspecies. Type, 11.5 mm 80 



10. Dentalium sowerbyi Guilding. Greatly enlarged 79 



164 



