LIST OF ILLUSTRATIONS. 



PAGE, 



Frontispiece. A Jelly-fish 

 with the fry of the Horse 

 Mackerel (from speci- 

 mens captured by Mr F. 

 W.GambleoffValentia). 

 Fig. 1 Globigerina Shell 21 

 Fig. 2 Radiolarian Shells 22 

 Fig. 3 Common Pipe-fish 

 (from Royal Natural 

 History) ... 25 

 Fig. 4 Phyllopteryx(from 



Royal Natural History 26 

 Fig. 5 Diagrams of Eyes 27 

 Fig. 6 A branch of the 



Zoophyte Obelia . . 30 

 Fig. 7 Medusa produced 



by Obelia ... 31 

 Fig. 8 A Bivalve Mollusc 35 

 Fig. 9 The common Sole 37 

 Fig. 10 The Angler (from 



Royal Natural History) 38 

 Fig. 11 Vertical section of 



a Balanus (after Glaus) 40 

 Fig. 12 Nauplius larva of 



a Balanus (after Groom) 41 

 Fig. 13-Sea-urchin . 43 

 Fig. 14 Smooth - shelled 



Gastropod . . .47 

 Fig. 15 Spiny Gastropod 47 

 Fig. 16 A Cuttle-fish . 49 

 Fig. 17 The Wrasse . 51 

 Fig. 18 The John Dory 54 

 Fig. 19 Polyp of a Mad- 

 repore Coral (after 

 Fowler) ... 58 



PAGE 



Fig. 20 Chsetodon . . 62 

 Fig. 21 Globe-fish. . 64 

 Fig. 22 Stereosoma . 67 

 Fig. 23 Coral-reefs . 69 

 Fig. 24 Periophthalmus 74 

 Fig. 25 Free - swimming 



Copepod (after Claus) . 88 

 Fig. 26 Swim-bladder of 



Velella . . .96 

 Fig. 27 Solitary form of 



Salp .... 99 

 Fig. 28 Pteropod . . 101 

 Fig. 29 Shells of Fora- 



minifers . . .104 

 Fig. 30 Globigerina . 105 

 Fig. 31 Young larva of 



a Star-fish . . .111 

 Fig. 32 Pluteus larva . 113 

 Fig. 33 Long-spined Bar- 

 nacle - nauplius (after 

 Chun) . . . .116 

 Fig. 34 Sun-fish . . 122 

 Fig. 35 The common 



Porpoise . . .129 

 Fig. 36 A deep-sea Fish 



(after Filhol) . . 139 

 Fig. 37 Hermit-crab and 



Sponge . . . 149 

 Fig. 38 Section through 

 a Sponge showing Her- 

 mit-crao . . .150 

 Fig. 39 A Trepang . 153 

 Fig. 40 A Crab-gall . 158 

 Fig. 41 A parasitic Cope- 

 pod .... 169 



