HAMMER-HEADED SHARK. 



61 



CHONDROPTERYGII. 



SQUALW/E. 



THE HAMMER-HEADED SHARK. 



Z:!/gc 



illeus. Val. 



Zygxna, 



Marteau, 

 Zygoena, 



,, Salviani 



Squalus zygoena, 



Squale marteau, 



Zygoena malleus, 



Belon, p. 61. 

 RONDELET, 1554, p. 389. 

 1558, p. 304. 

 Salvianus, tab. 40. 

 , WiLLOUGHBY, p. 55, B. 1. 

 Linn. Syst. Nat. t. i. p. 399, sp. 5. 

 DuHAMEL, sect. IX. pi. XXI. fig. 3. 

 Lacepede, t. i. p. 257, 4to. edit. 

 ,, t. V. p. 443, 8vo. edit. 

 Risso, Icht. p. 34. 



„ Hist. p. 125. 

 Val. Mem. du Mus. t. ix. p. 222. 



Generic Characters Head depressed, more or less truncated in front, the 



sides extended horizontally to a considerable length, with the eyes at the 

 external lateral extremity. Teeth of the same shape in the upper and lower 

 jaw, viz. the points directed towards the corner of the mouth, with a smooth 

 edge when young, but distinctly serrated in adult specimens. Branchial open- 

 ings five. Two dorsal fins, the first in a line close behind the pectorals ; the 

 second over the anal fin. 



