LIST OF rLLTTST RATIO ITS. 



The Blue Shark Frontispiece 



The Common Pike 1 



Skeleton of the Common Perch 3 



Skull of Codfish 5 



Scales of Fish 



Diagram of Brain of Codfish 10 



Jaws of Male and of Female Skate . . . .12 



Internal Anatomy of the Carp 13 



Swimming Bladder of Carp 14 



The African Mud-fish 19 



The Ceratodus 21 



The Polypterus 22 



A Vertebra of the American Bony Pike . . .23 



Chimaera Colliei 24 



Diagram of Brain of Skate ...... 25 



The Hammer-headed Shark 28 



The Smooth Hound 29 



The Nurse Hound 32 



Egg Purse of Nurse Hound J 



Egg of Cestracion ; Section of the same . . .33 



The Picked Dog-fish 34 



The Monk-fish 36 



The Torpedo Marmorata .39 



TheThornback 42 



The Common Sturgeon 45 



Ostracion quadricornis ....... 49 



Tetrodon fahaka (Floating Belly upward) . . .50 



The Broad-nosed Pipe-fish 54 



The Phyllopteryx 57 



The Whiting 61 



The Lesser Sand Eel 66 



The Turbot 68 



The Plaice 70 



The Rainbow Wrasse 76 



The Epibulus Insidiator 77 



The River Perch 78 



The Bass 79 



The Toxotes To face page 81 



The Pelor filamentosum 82 



The Maigre . 84 



The Common Sword-fish . . .To face page 85 



The Flying Sword-fish 85 



The John Dory 87 



TheOpah 88 



The Pilot-fish 90 



The Sucking-fish, or Remora 91 



The Uranoscopiis Scaber 93 



The Malthe Vespertilio 94 



The Sea Scorpion 95 



The Armed or Mailed Gurnard 97 



The Butterfly Blenny 99 



The Ten-spined Sticklebacks 101 



The Fifteen-spined Stickleback 102 



The Trumpet-fish, or Bellows-fish ....'. 104 



The Climbing Perch 105 



Supra-branchial Organ of the Climbing Perch . . 106 



Malapterurus electricus 109 



Loricaria cataphracta 110 



The Salmon 113 



The Common Trout . . .To face page 117 



. 118 



The Smelt . 



The Grayling 



The Garfish . 



The Exocoetus volitans 



The Crucian Carp . 



119 

 122 

 123 

 126 



The Roach 129 



The Tench 131 



Rhodeus amarus 132 



Vertebra of Herring 135 



The Herring 136 



The Sprat .137 



The Conger Eel 142 



PAGE 



The Pegasus Draconis . .... 144 



The Sea Lamprey . . .... 144 



The River Lamprey . .... 145 



The Lancelot . . . .... 147 



Tongue of the Octopus . .... 155 



Fabled Position of the Paper Nautilus . . . .150 



The Paper Nautilus and the Octopus . To face page 157 

 Argonaut as it Swims Backward (Natural Position) . 157 



Paper Nautilus in its Shell 157 



Cross Section of Arm of Octopus Suckers of Octopus . 158 

 The Common Octopus ....... 159 



Octopus horridus Octopus macropus . . . . 1 60 



The Common Octopus . . . .To face parie 161 



The Octopus Reposing 162 



The Pinnoctopus Cirroteuthis Mulleri . . . 164 



The Common Squid 167 



Buccal Aspect of Common Squid Loligopsis . . 168 



The Pen of the Calamary 169 



Gigantic Cuttle-fish Hooked off Teneritfe . . .172 

 Upper and Lower Jaw of Architeuthis monachus . . 173 

 Marginal Ring of Sucker from one of the Sessile Arms 

 of Architeuthis monachus. Large and Small 

 Sucker from the Tentacular Arms of Same. Larger 

 Sucker from Tentacle of Same .... 173 



Belemnite Restored 175 



The Common Cuttle 176 



Branchiae and Hearts of Common Cuttle . . . 177 



Sepia elegans 178 



Eggs of the Common Cuttle-fish Shell of the Sepia . 180 



Section of Spirula Australis 181 



Spirula Australis 182 



Interior of the Shell of the Pearly Nautilus . . . 185 

 Exterior of the Shell of the Pearly Nautilus . . 186 

 Section of the Shell of the Pearly Nautilus . . .186 



Shell of Triton 191 



Strombus gigas, with the Animal Pteroceras lambis . 192 

 Murex tenuispina Mitra episcopalis .... 193 



Fusus proboscidalis 194 



A Group of Sea Snails Patella vulgata ; Buccinum 

 undatum ; Nassa reticulata ; Haliotis tuberculata ; 



Littorina littorea 196 



Purpura lapillus Purpura patula .... 197 

 Magilus aritiquus Harpa imperialis Harpa articularis 198 

 Oliva erythrostoma Oliva porphyria .... 199 

 Cassis canaliculatus Cassis madagascariensis . . 199 

 Triton variegatum . .... 200 



Cones and Volutes . To face page 201 



Terebra tigrina .... 201 



The Cowry (Cyprsea tigris) and its Animal . . . 203 

 The Money Cowry . .... 204 



Cowries ... .... 205 



Ovuluni volva 206 



Natica papilionis 207 



Solarium perspectivum Scalaria pretiosa Cerithium 



aluco 209 



Turritella terrebellata Vermetus lumbricalis . . 210 

 Melania amarula Lingual Teeth of Ampullaria 



Ampullaria canaliculata 211 



Phorus conchyliophorus Turbo argyrostomus Turbo 



imperialis . . 214 



Trochus niloticus Trochus virgatus Haliotis tri- 



costalis 215 



Pleurotomaria quoyana Pleurotomaria platyspira . 216 

 lanthina communis lanthina and its Raft . . . 217 

 Dentalium elephantinum Chiton magnificus . . 219 

 Anatomy of the Common Garden Snail . . . 220 



Land Snails To face page 221 



Helix pomatia 221 



Lingual Teeth of Achatina fulica .... 222 



A Slug. (Arion ater, " Black Arion") .... 223 

 Lingual Teeth of Testacella haliotides .... 223 

 Limnsea stagnalis Physa castanea . 224 



