340 



CENTRINA SHARK. 



Squalus Centrina. S.fuscus^ siihtus pallidior, corpore subtrigonoj 



pinnis dorsalibus spinosis. 

 Brown Shark, paler beneatli, with subtrigonal body, and spiny 



dorsal fins. 



Squalus Centrina. S, pinna anali nulla, dorsalibus spinosis, 



corpore subtriangulari. Lin. Syst. Nat. 

 Centrina. Gesn. Salv. Aldr. Will. 8fC. 

 Squalus unica serie dentium incisorum in maxillk inferiore. 



Block, t, 115. 



Length from three to four feet : habit thick and 

 short : bodj^ of a somewhat triangular shape, the 

 sides shelving down from the back, and the abdo- 

 men being flattish : head somewhat small : snout 

 blunt : in the upper jaw three rows of teeth, in the 

 lower a single row ; all rather slender and sharp- 

 pointed : first dorsal fin very large, commencing at 

 a small distance from the head, subtriangalar, and 

 furnished in front with a strong and sharp spine 

 projecting through the skin at some distance from 

 the tip, and pointing rather forwards than back- 

 wards : second dorsal fin much smaller, situated 

 near the tail, and furnished with a similar sjjine, 

 but pointing backwards : tail rather small, short, 

 and obscurely bilobate : colour dusky brown, paler 

 beneath : skin rough, and beset with tubercles : 

 native of the European seas, but a rare species iu 

 comparison with many others of the genus. 



