INDEX. 



207 



Cod-fish, teeth of, 41. 



,, (dwarf) fins of, 64. 

 feeding of, 81. 



sexual difference in, 



100. 



eggs of, 113, 118. 

 offer-fish, scales of, 30. 

 ,, colours of, 72. 



Colouration of fishes, bril- 

 liance of, 73. 

 ,, change of, 73, 75 



Colour, change of, 173. 

 ,, of dying fishes, 75 

 , , nature of, 73, 76, 77. 

 ,, need of, 76. 

 ,, variation of, 72, 75. 

 Crenildbrus, nest of, 107. 



D. 



Dabs, feeding of, 82. 

 JJapedius, tail of, 56. 

 Devil-fish, defence of young 



of, 106. 



Diodon, scales of, 30. 

 Dinichthys, armour of, 202. 



,, ' affinities of , 202. 

 Diphirus, tail of, 56, 179. 

 Dog-fish, gills of, 25. 



, , scales of, 37. 



,, eggs of, 112. 



E. 



Eagle -ray, teeth of, 39. 



,, feeding of, 86. 

 Echeineis, suckers of, 59. 

 Eels, naked skin of, 28. 



scales of, 28. 



,, lava of, 129. 



,, electric, 158. 



,, fossil, 188. 

 Eggs, numbers of, 113. 

 Eggs, floating, 119. 



Electrical fishes, 158. 



JKlops, ancient nature of, 186. 



F. 



Fan-finned, fishes, 176, 180. 

 > ceding, methods of, 79. 

 File-fish, teeth of, 43. 

 ,, poison of, 157. 

 , , locomotion of, 13. 

 Fins, nature of, 11, 17. 

 uses of, 57. 

 origin of, 65, 68. 



Fi 



i, form of, 11. 



transparent, 71. 



voracity of, 94. 



armour of, 100. 



classification of, 191. 



tadpole stage of, 194. 



evolution of, 18, 97. 



origin , new groups of, 1 5. 



liveries of, 69. 

 Fishing-frog, eggs of, 113. 

 Flying-fishes, flight of, 63. 



, , young of, 137. 



Food, influence in colour, 96. 

 Fox-shark, feeding of, 84. 

 Frog-fish , poison organs of , 1 56. 



G. 



Gar-pike, beak of, 89. 



,, affinities of, 185. 

 Gills, function of, 19. 



,, forms of, 21, 22, 25, 27, 



57. 



Gilt-head, feeding of, 84. 

 Globe-fish, teeth of, 42. 

 ,, poison of, 157. 

 Goby, nest of, 106. 



,, duration of life of, 



119. 



Gourami, organs of touch of, 

 64. 



