xviii List of Illustrations 



Pterophryne tumida, Sargassum-fish 52 



Shoulder-girdle of Sebastolobus alascanus 52 



Cranium of Sebastolobus alascanus 53 



Lower Jaw and Palate of Sebastolobus alascanus 54 



Maxillary and Pre-maxillary of Sebastolobus alascanus 55 



Part of Skeleton of Selene vomer 55 



Hyostilic Skull of Chiloscyllium indicum, a Scyliorhinoid Shark 56 



Skull of Heptranchias indicus, a Notidanoid Shark '. 56 



Basal Bones of Pectoral Fin of Monkfish, Squatina 56 



Pectoral Fin of Heterodontus philippi 57 



Pectoral Fin of Heptranchias indicus. 57 



Shoulder-girdle of a Flounder, Paralichthys calif ornicus 58 



Shoulder-girdle of a Toadfish, Batrachoides pacifici 59 



Shoulder-girdle of a Garfish, Tylosurus fodiator 59 



Shoulder-girdle of a Hake, Merluccius productus 60 



Cladoselache fyleri, Restored 65 



Fold-like Pectoral and Ventral Fins of Cladoselache jyleri 65 



Pectoral Fin of a Shark, Chiloscyllium 66 



Skull and Shoulder-girdle of Neoceratodus jorsteri, showing archipterygium ... 68 



Acanthoessus wardi 69 



Shoulder-girdle of Acanthoessus > 69 



Pectoral Fin of Pleuracanthus 69 



Shoulder-girdle of Polypterus bichir 70 



Arm of a Frog 71 



Pleuracanthus decheni. .,.,.. 74 



Embryos of Heterodontus japonictis, a Cestraciont Shark 75 



Polypterus congicus, a Crossopterygian Fish with External Gills 78 



Heterocercal Tail of Sturgeon, Acipenser sturio 80 



Heterocercal Tail of Bowfin, Amia calva 82 



Heterocercal Tail of Garpike, Lepisosteus osseus 82 



Coryphanoides carapinus, showing Leptocercal Tail 83 



Heterocercal Tail of Young Trout, Salmo fario 83 



Isocercal Tail of Hake, Merluccius productus 84 



Homocercal Tail of a Flounder, Paralichthys calijornicus 84 



Gephyrocercal Tail of Mola mola 85 



Shoulder-girdle of Amia calva 86 



Shoulder-girdle of a Sea-catfish, Selenaspis dowi 86 



Clavicles of a Sea-catfish, Selenaspis dowi 87 



Shoulder-girdle of a Batfish, Ogcocephalus radiatus 88 



Shoulder-girdle of a Threadfin, Polydactylus approximans 89 



Gill-basket of Lamprey 92 



Weberian Apparatus and Air-bladder of Carp 93 



Brain of a Shark, Squatina squatina no 



Brain of Chimara monstrosa no 



Brain of Protopterus annectens no 



