List of Illustrations xix 



Brain of a Perch, Perca flavescens ........................................ m 



Petromyzon marinus unicolor. Head of Lake Lamprey, showing Pineal Body, in 



Chologaster cornutus, Dismal-swamp Fish ................................. 116 



Typhlichthys subterraneus, Blind Cave-fish ................................ 116 



Anableps dovii, Four-eyed Fish .......................................... 117 



Ipnops murrayi ........................................................ 118 



Boleophthalmus chinensis, Pond-skipper ................................... 118 



Lampetra wilderi, Brook Lamprey ....................................... 120 



Branchiostoma lanceolatum, European Lancelet ............................ 120 



Pseudupeneus maculatus, Goatfish ........................................ 122 



Xiphophorus helleri, Sword-tail Minnow .................................. 124 



Cymatogaster aggregatus, White Surf-fish, Viviparous, with Young ............ 125 



Goodea luitpoldi, a Viviparous Fish ....................................... 126 



Egg of Callorhynchus antarcticus, the Bottle-nosed Chimaera ................. 127 



Egg of the Hagfish, Myxine limosa ....................................... 127 



Egg of Port Jackson Shark, H eterodontus philippi ......................... 128 



Development of Sea-bass, Centropristes striatus ........... ................. 135 



Centropristes striatus, Sea-bass ........................................... 137 



Xiphias gladius, Young Swordfish ....................................... 139 



Xiphias gladius, Swordfish .............................................. 139 



Larva of the Sailfish, Istiophorus, Very Young ............................ 140 



Larva of Brook Lamprey, Lampetra ivilderi, before Transformation .......... 140 



Anguilla chrisypa, Common Eel ......................................... 140 



Larva of Common Eel, Anguilla chrisypa, called Leplocephalus grassii ....... 141 



Larva of Sturgeon, Acipenser sturio .......................... . ........... 141 



Larva of Chcetodon sedentarius ........................ , .................. 142 



Chcetodon capistratus, Butterfly-fish ....................................... 142 



Mola mola, Very Early Larval Stage of Headfish, called Centaur us boops ...... 143 



Mola mola, Early Larval Stage called Molacanthus nummularis .............. 144 



Mola mola, Advanced Larval Stage ....................................... 144 



Mola mola, Headfish, Adult .............................................. 146 



Albula vulpes. Transformation of Ladyfish from Larva to Young ........... 147 



Development of the Horsehead-fish, Selene vomer .......................... 148 



Salanx hyalocranius, Icefish ............................................. 149 



Dallia pecloralis, Alaska Elackfish ....................................... 149 



Ophiocephalus barca, Snake-headed China-fish ............................ 150 



Carassius auratus, Monstrous Goldfish ................................... 151 



Jaws of Nemichthys avocetta ............................................ 156 



Cypselurus californicus, Flying-fish ....................................... 157 



Ammocrypta clara, Sand-darter .......................................... 158 



Fierasfer acus, Pearlfish, issuing from a Holocanthurian ..................... 159 



Gobiomorus gronovii, Portuguese Man-of-war Fish ......................... 160 



Tide Pools of Misaki ................................................... 161 



Ptychocheilus oregonensis, Squawfish ..................................... 162 



Ptychocheilus grandis, Squawfish, Stranded as the Water Falls ............... 164 



