TABULAR SCHEME. 



47 



Eye without nictitating membrane 

 Tail not keeled 



Upper lobe very long Alopecias, 227. 



Tail keeled 



Teeth large and lancelate Lamna, 226. 

 Teeth small and conical Selache, 228. 



Tail homocercal 



Lower lobe of tail the larger 



Pectorals long and used for flight Exocattus, 89, go 

 Lobes of tail equal 



Tail at an angle to backbone Trachypterus, 102. 

 Tail in a line with backbone 

 Body short and stout 



Scales forming a carapace Batistes, 120, 121. 

 Gullet dilatable into a sphere Tetrodon, 122. 

 Body deep and compressed 



Iridescent, with round silvery spots Lampris, 33. 

 Grey, with black blotch edged with yellow, and spines 



with filaments Zeus, 29. 

 Snout long and tubular Ctntriscus, 98. 

 Fore half squarish, hinder half narrow ; ocellated spotr. 

 along lower edge Argyropelecus, 187. 



Body long and slender 

 Ridged, with bony plates 

 Caudal ridge continuous with lateral Siphonostoma, 



114. 



Caudal ridge continuous with dorsal Syngnathus, 115^ 

 Both jaws prolonged into a beak 

 With finlets Scombresox, 88. 

 Without finlets Belone, 87. 



Body eel-like 



With ventrals ; dorsal spotted Centronotus, Si. 

 Without ventrals Ammodytes, 145-147. 



Body long and compressed 



Dorsal long-, and highest in middle or near tail 

 Centrolophus, 30, 31. 



Body long, thin, and tapering 

 Tail forked, each ventral represented by a single scale 



Lepidopus, 23. 



Upper jaw produced into a long sword Xiphias, 21. 

 First dorsal replaced by a sucker Echeneis, 44. 

 First dorsal hidden in a fleshy ridge 



Body bulky, with ridges and tubercles Cyclopterus, Go. 

 First dorsal replaced by isolated spines 



Spines with filaments 



Head large ; mouth very large Lophius, 47. 

 Spines without filaments 



Tail deeply forked and tipped with black Lichia, 27. 



