GENERAL INDEX. 



Page 



Ethmoid .. 632 



Basilar '...-.: 632 



Body of the sphenoid 632 



Parietal bones 632 



Interparietal 632 



External occipitals 632 



Lateral occipitals 632 



Alar bones 632 



Mastoid bones 632 



Petrous bones 632 



Anterior sphenoid 632 



Orbital alee of sphenoid 632 



Vomer 632 



Bones composing the upper jaw 632 



Intermaxillary bones 633 



Maxillary bones 633 



Bones of the face 633 



Nasal bones 633 



Suborbital 633 



Supra-temporal 633 



Pterygo-palatine and temporal system of bones 633 



Palatine 633 



Transverse bone 633 



Internal pterygoid 633 



Temporal bones . 634 



Tympanic bones 634 



Jugal bones 634 



Articulation of the gill-covers 634 



Opercular bones 634 



Prceoperculutn 634 



Operculum 634 



Suboperculum 634 



Interoperculum 634 



Lower jaw 634 



Dental 634 



Articular 634 



Angular 634 



Opercular 634 



Os hyoides and branchiostegous rays 635 



Styloid bones 635 



Branchiostegous membrane 635 



Branchial apparatus 636 



Structure of branchial arches 636 



Pharyngeal bones 636 



General disposition of the skeleton in osseous fishes 636 



Muscular system 637 



PLEURONECTID.E or FLAT-FISHES 638 



Osteology of the Flounder (Pleuronectes flesus) . ...... 638 



Skeleton of the CHONDROPTERYGII 640 



TEGUMENTARY or EXO-SKELETON of fishes 642 



Structure and growth of scales 642 



Cuticular spines 643 



Association of the exo- and endo-skeleton 643 



Convertibility of the exo-skeleton into true bone 643 



Nature of dorsal fins and interspinous bones 644 



opercular bones 644 



Swimming-bladder of fishes 645 



Structure of the mouth in fishes 646 



Modifications in the arrangement of their dental system . . . 646 



Dental apparatus of the Myxine . . . . . - - - 647 



Lamprey 647 



CyprinidtB 647 



Eaidce 647 



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