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GEOGRAPHICAL ZOOLOGY. 
[PART IV 
Sub ■ class IV. — CHONDKOPTERYGII. (Sharks 
and Kays.) 
Order I. — IIOLOOEPHA LA . ( Chimceras .) 
Family 98. — CHlMiERIDiE. (2 Genera, 4 Species.) 
t£ Shark-like marine fishes, snout of the male with a prehensile 
organ.” 
Distribution. — Northern and Southern temperate seas. Chi- 
mcera is British. 
Order II. — PL A GIOSTOMA TA. 
Sub-order. — Selachoidea. (Sharks.) 
Family 99. — CARCHARIIDJE. (11 Genera, 59 Species.) 
“ Sharks with two dorsals and a nictitating membrane.” 
Distribution. — Seas of the Arctic, temperate, and tropical 
regions. Species of Galms and Mustelus have occurred on our 
coasts. 
Family 100. — LAMNID^F. (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. 
