414 SYNOPSIS. 



semicircular form ; eyes large, oblong-oval ; both dorsals 

 placed far back, the first over the space between the ven- 

 tral and anal fins ; ventrals cut obliquely at their poste- 

 rior margin ; skin rough and glistening, all the upper parts 

 marked with numerous small dark reddish spots on a pale 

 reddish ground, lower parts of the sides, and the belly, 

 reddish white. — Cuv. Reg. An. ; Jenyns' Brit. Vert.y 

 495 ; Yarr, Brit. Fish., ii. 487. Squalus canicula, Livm.y 

 Perm. Brit. Zool., iii. pi. 19, upper fig. male ; lower, fern. ; 

 Don. Brit. Fi^h., pi. 65. 

 Sp. 218. S. catulus. Large-spotted Dog-fish. Spots large 

 and not very numerous; ventral fins cut square at the 

 end ; valves of the nostrils separate, not reaching to the 

 mouth ; second dorsal in a line over the lower portion of 

 the anal ; upper parts brownish grey, scarcely tinged with 

 red. — Cuv. Reg. An.; Yarr. Brit. Fish.., ii. 493. S. stel- 

 laris. Rock Dog-fish, Jenyns' Brit. Vert., p. 496. Squalus 

 catulus and stellaris, Linn» 

 Sp. 219. iiS. melanostomum. Black-mouthed Dog-fish. Snout 

 rather long and conical ; upper edge of the tail with a 

 series of large scales arranged like the teeth of a saw ; 

 colour of the back light brown, two rows of ocellated spots 

 on each side, and numerous irregular spots scattered over 

 the surface ; interior of the mouth nearly black. — Bonap. 

 Favm,. Ital. Fasc, vii. Pristiurus melanostomus, Muller 

 ^ ffenle, Flag., p. 15 ; Yarr. Brit. Fish., ii. 495. 

 Gen. CVI. Carcharias. Snout produced and depressed, 

 the nostrils not prolonged in a groove ; two dorsal fins, the 

 first placed over the space between the pectoral and abdominal 

 fins ; caudal with a lobe beneath, causing it to appear forked ; 

 no temporal orifices ; teeth flat, triangular and cutting, those 

 in the upper jaw serrated on the edges. 



Sp. 220. C. glaucus. Blue Shark. Body deepest at the 

 point of the insertion of the pectoral fins, behind that 

 compressed and tapering ; ventral fins small, obliquely 

 truncate, on the space beneath the first and second dor- 

 sal ; anal opposite the second dorsal ; upper surface slate- 



