THE ANATOMY OP A HAMMERHEAD SHARK. 



971 



45. A Contribution to the Anatomy of a Hammerhead Shark 

 (^Zygcena malleus Shaw). By J. H. Lloyd^ M.Sc. 

 (Birm.), F.Z.S., and Edith M. Sheppaed, B.Sc. 

 (Wales), F. Z.S.J Zoological Department, University 

 College, Cardiff. 



[Received April 20, 1922 : Read November 21, 1922.] 



(Text-figures 1-7.) 



The specimen on which this paper is based was given to us by 

 Professor W. N. Parker, of University College, Cardiff, to whom 

 our best thanks are due for his generosity. The specimen was 

 sent to him some years ago by the late J. J. Neale, Esq., a local 

 trawler owner, but unfortunately the fishermen had eviscerated 

 it immediately after it was caught. 



Text-figures 1 & 1 a. 

 a.c. 



Head in Ventral Vie'w. 



a.c. ampuUary canals. 



11. g. nasal groove. 



g.s. gill slits. 



n.m. nictitating membrane. 



n. nostril. 





1 a. Dermal Denticle. 



In this short paper we intend to include notes on the structure 

 of the skull, brain, cranial nerves, and membranous labyrinth. 

 Owing to the long immersion in spirit to which the specimen had 

 been subjected the preparation of the skeleton proved to be a 



