CUAP. XX.] FISHES. 461 



Family 101.— EHINODONTID^. (1 Genus, 1 Species.) 



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

 tating membrane." 



Distribution. — South and East xVfrica. 



Family 102.— NOTIDANIDiE.. (I Genus, 4 Species.) 



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



Distribution, — Temperate and tropical seas, from the j^orth 

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

 has occurred on our southern coasts. 



Family 103. — SCYLLIID.F. (7 Genera, 2o Species.) 



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



Distribution.— All temperate and tropical seas. Species of 

 Scyllmm and Pristiurus are British. 



Family 104— CESTEACIONTID^. (1 Genus, 4 Species.) 



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



Distribution. — Pacific Ocean from Japan to Xew Zealand, 

 Moluccan Sea. 



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



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

 anal fiu." 



Distribution. — Arctic, temperate, and tropical seas. Species 

 o'i Acanthias, Lmmargus, and Echinorliinus have occiu-red on our 

 coasts. 



