HAMMER-HEADED SHARK. 505 



quently had the pleasure to refer to in the History of the 

 British Birds, and also in the British Fishes, it is stated at 

 page 17 that a specimen of the St/ualus zygcena, or Hammer- 

 headed Shark, was taken there in October 1829, and deposited 

 in the Norwich Museum ; and by the kindness and influence 

 of J. H. Gurney, Esq. of Norwich, I have had the loan of 

 drawings that were made from this Shark sent to London for 

 my use in this work. 



In August 1839 another example of this species of Ham- 

 mer-headed Shark was taken in a herring-net off the Monk- 

 stone rocks, about two miles to the west of Tenby. Of the 

 capture of this fish I was favoured with notices from the Rev. 

 T. Salwey of Tenby, Dr. John Ford Davis of Bath, and J. 

 Dillwyn Llewelyn, Esq. of Penllergare. The latter gentle- 

 man has published an account, with measurements of the fish 

 and other particulars, in a paper communicated to the Royal 

 Institution of South Wales ; and Mr. Salwey's obliging letter 

 contained an excellent outline of the form, with various mea- 

 surements. The whole length of the fish, when fresh, was 

 ten feet three inches ; the circumference of the body six feet, 

 and it was supposed to weigh between six and seven hundred 

 pounds : the teeth were in six rows, flat, pointed, curved and 

 sharp ; the back of a dark greenish lead colour, and reddish 

 yellow on the belly. When opened on the third day after 

 capture, the body contained thirty-nine young ones, perfectly 

 formed, and each about nineteen inches in length. 



Among the numerous species included in the genus 

 Squalus of Linnseus, and I might say, indeed, in the 

 whole class of Fishes, there is no form more extraordinary 

 than that of the Hammer-headed Sharks, four species of 

 Avhich are noticed in the memoir by M. Valenciennes here 

 quoted, where they are considered as a sub-genus, under the 

 name of Zygacna. 



The Hammer-headed Shark taken on the coast of Norfolk 



