460 GEOGRAPHICAL ZOOLOGY. [part iv. 



Subclass IV.— CHONDROPTERYGII. (Sharks 

 AND Rays.) 



Order I.—HOL CUFEA LA. ( Chimccras.) 



Family 98.— CHIM^RID^. (2 Genera, 4 Species.) 

 " Shark-like marine fishes, snout of the male with a prehensile 



orfjau. 



Distribution. — JSTorthern and Southern temperate seas. Chi- 

 ■mwra is British, 



Order II.—PLAGIOSTOMATA, 

 Sub-order. — Selachoidea. (Sharks.) 



Family 99.— CARCHARIID^. (11 Genera, 59 Species.) 



" Sharks with two dorsals and a nictitating membrane." 



Distribution. — Seas of the Arctic, temperate, and tropical 

 regions. Species of GaUvs and Mnsiehfs have occurred on our 

 coasts. 



Family 100.— LAMNID^. (5 Genera, 7 Species.) 



" Sharks with two dorsals and no nictitating membrane." 



Distribution. — Temperate and tropical seas. Species of 

 Lamna, Alopecias, and Selache have occurred in British seas. 



