CHAP, xx.] FISHES. 461 



FAMILY 101. KHINODOOTID^E. (1 Genus, 1 Species.) 



" Sharks with two dorsal fins, the second small, and no nicti- 

 tating membrane." 



DISTRIBUTION. South and East Africa. 



FAMILY 102. NOTIDANTD^. (1 Genus, 4 Species.) 

 " Sharks with one dorsal fin and no nictitating membrane." 



DISTRIBUTION. Temperate and tropical seas, from the North 

 Atlantic to the Cape of Good Hope and California. One species 

 has occurred on our southern coasts. 



FAMILY 103. SCYLLIID.E. (7 Genera, 25 Species.) 

 " Sharks with fene dorsal fin; and no nictitating membrane." 



DISTRIBUTION. All temperate and tropical seas. Species of 

 Scyllium and Pristiurus are British. 



FAMILY 104CESTEACIONTID^E. (1 Genus, 4 Species.) 

 " Sharks with two dorsal fins and no nictitating membrane." 



DISTRIBUTION. Pacific Ocean from Japan to New Zealand, 

 Moluccan Sea. 



FAMILY 105. SPINACID^E. (10 Genera, 21 Species.) 



" Sharks with two dorsal fins and no nictitating membrane, no 

 anal fin." 



DISTRIBUTION. Arctic, temperate, and tropical seas. Species 

 of Acanthias, Lcemargus, and Echinorhinus have occurred on our 

 coasts. 



