Proc. Roy. Soc. Fdin.] 
[Vol. XXXIIi 
R. H. R. photo . R. TT. R. photo. 
Fig. 1. — Functional Maxillary Tooth of Sperm Whale, with Fig. 2. — Functional Maxillary Tooth of Sperm 
surrounding portions of gum ; nat. size. Whale, showing shape of embedded portion. 
A. J.TT. E. photo , 
Fig. 3. — Head of Sperm Whale, under surface, with lower jaw hanging open. 
Dr J. Ritchie and Mr A. J. H. Edwards. 
