SQUALID.E. 



CHONDROPTERYGII. 



SQUALID 



THE PICKED DOG-FISH. 

 BONE-DOG, Sussex. HOE, Orkney. 



Acanthiitsvutgaris, 

 Spinax acanthias, 

 Galeus ,, 

 Squaliis ,, 



Risso, Hist. vol. iii. p. 131. 



L'aiguillat, CUVTER, Regne An. t. ii. p. 391. 



she spinux, WJLLUGHBY, p. 56, B. 5, f. 1. 



LINN/EUS. BLOCII, pt. iii. pi. 85; the young, pt. iii. pi. 75, 



fig. 1. 



,, spinax, Picked Shark, PF.NN. Brit. Zool. vol. iii. p. 133. 

 ,, acaiithins, ,, ,, DON. Brit. Fish. pi. 82. 



Spinax ,, Common Dog-Jish, FLEM. Brit. An. p. 166, sp. 10. 



Squaltts ,, Picked Dog-fsh, JENVNS, Man. Brit. Vert. p. 505, sp. 194. 



Nn.ss. Prod. p. 117. 



,, ,, BLAINV. Faun. Franf. p. 57. 



Spinax acanthias, BONAP. Faun. Ital. fasc. viii. 



ACANTIIIAS. Generic Characters. Two dorsal fins, with a spine before 

 each ; first dorsal behind the line of the pectorals ; the second dorsal over the 

 space between the ventral and caudal fins; no anal fin. Skin rough in one 

 direction ; the scales heart-shaped, with a central spine directed backwards. 

 Temporal spiracles large. Several rows of teeth in both jaws, cutting and 

 sharp, the points directed outwards and backwards. 



THE PICKED Doo-FisH is a very common species, at 

 once distinguished from the other British Sharks by the sin- 

 gle spine placed in advance of each of its two dorsal fins, 

 a weapon from which it derives its specific appellation, pick 



