ziPHius. 79 



in a smooth projection representing the outer lobe 

 in Mesoplodon ; a minute tubercle separated from 

 the projection by a faint groove may represent the 

 inner lobe ; the cavity opens by a wide Eustachian 

 orifice close to the anterior end of the inferior 

 surface. Periotic 2^^ inches long, 1^^ inch broad. 

 The stapes is attached to wall of tympanic cavity. 

 Figured in Trans. Roy Soc. Edin., vol. xxvi.,'1872, also 

 on p. 78 and below. Turner Collection. 



3. Skull, adult, with mandible, presented by Sir James 

 Hector and labelled Epiodon duifhamensis; occipital, 

 pterygoid, and palatal regions imperfect ; length of 

 beak 21 inches, breadth at base 10| inches ; medio- 

 rostral bone, length 15-^ inches, breadth 2^ inches, 

 attenuated anteriorly. Mandible, length 2 feet 9i 

 inches, teeth absent, sockets filled with bone, length 

 of symphysis 8 inches. See Turner, Cliallengev 

 Reports, part iv., 1880, for description. When 

 compared with the Shetland Ziphius, No. 1, no 

 specific difference appeared to exist between them. 

 Chatham Islands. Challenger Collection. 



(2) Ziphius medilineatus, Oiuen. (Z. m.) 



1. Rostrum, cast of mineralised beak, from the Suffolk Red 

 Crag. Purchased from Mr Edward Charlesworth. 



(8) Ziphius, species uncertain. 



1 . Rostrum, two vertical trans\'erse sections of the mineralised 

 beak of a fossil Ziphinx. 

 From the Suffolk Red Crag, Woodbridge. 



Purchased from Mr Edward Charlesworth. 



