778 professor turner on ziphitjs cavirostris, etc. 



Mesoplodon Sowerbyi. 



Examples from coast of Elgin, Scotland ; Havre ; Calvados ; Ostend ; 

 Norway ; Brandon Bay, Ireland ; also in the Edinburgh Museum of 

 Science and Art. 

 Mesoplodon densirostris. 



Examples from Seychelles Islands ; Lord Howe's Island. 

 Mesoplodon Layardi. 



Example from Cape of Good Hope. 

 Mesoplodon europ^eus. 



Example from La Manche, France. 



Provisionally also, the specimen captured in Little Bay, near Sydney, and 

 the animal caught in Titai Bay, New Zealand, may be registered as distinct 

 species of the genus Mesoplodon. 



Mesoplodon Guntheri. 



Example from Little Bay, Sydney. 

 Mesoplodon Hectori. 



Example from Titai Bay, Cook's Strait, New Zealand. 





EXPLANATION OF PLATES XXIX., XXX. 



The Plates have been lithographed from photographs of the crania, taken under my superintendence 

 by Mr Peter Thomson. 



Fig. 1. Dorsal surface of cranium of Ziphius cavirostris, reduced nearly one-tenth. 



Fig. 2. Anterior nares and pre-nasal fossa of the same animal. 



Fig. 3. Dorsal surface of cranium of Mesoplodon Sowerbyi, reduced one-ninth. In placing the skull 



before the camera, the photographer had unfortunately turned it over slightly to the left side, 



so that the picture is not absolutely a full face view. 

 Fig. 4. Occipital surface of the skull of Z. cavirostris. 

 Fig. 5. Occipital surface of the skull of M. Sowerbyi. 

 Fig. 6. Palatal aspect of the cranium of Z. cavirostris. 

 Fig. 7. Palatal aspect of the cranium of M. Sowerbyi. 

 Fig. 8. Profile view of cranium of Z. cavirostris. 

 Fig. 9. Profile view of the lower jaw ; and 



Fig. 10. View of the alveolar borders of the lower jaw of the same animal. 

 Fig. 1 1 . Profile view of the cranium of M. Sowerbyi. 

 Fig. 12. Profile view of lower jaw of same animal. 

 Fig. 13. Outer surface of tympanic bone ; and 

 Fig. 1 4. Outer surface of petrous bone of Z. cavirostris, both the size of nature. The stapes st. in this 



specimen is in situ. 



