334 



Quadrate bone, 71 

 Quadratojugal, 73 

 Quadratomaxillary, 132 



Radiale, 276 

 Radialia, 220, 223 

 Radius, 275 



Raia, pelvic appendage, 235 

 Rana, chondrocranium, 131 

 hyobranchials, 133 

 pectoral girdle, 247, 248 

 pelvis, 263 

 skull, 133 

 Regions of vertebral column, 25 

 Reptilia, appendages, 280 

 episternum, 55 

 pectoral girdle, 248 

 pelvic girdle, 263 

 scales, 14 

 skull, 136 

 sternum, 54 

 vertebrae, 42 

 Rhachitomous vertebrae, 32, 37 

 Rhinolophus, carpus, 295 

 Rhinoceros, feet, 298 

 Rhynchocephalia, appendages, 283 

 chondrocranium, 160 

 skull, 1 6c 

 vertebrae, 45 

 Ribs, 23 



abdominal, 16 

 amphibia, 39, 41 

 aves, 47 

 false, 51 

 haemal, 23 

 mammals, 51 

 pleural, 24 

 sternal, 51 

 vertebral, 51 

 Roof plates, 30 

 Rostral bone, 142, 168 

 Rostrum, 83 



sphenoid, 140 



Sacral vertebraj, 25 



Sacrum, 25 



Salamandrina, pectoral girdle, 246 



Salmo, caudal fm, 225 



chondrocranium, 105 

 Sauripterus, pectoral appendage, 244 

 Sauropsida, skull, 135 



INDEX 



Sauropterygia, free appendages, 282 

 pectoral girdle, 254 

 skull, 144 

 vertebrae, 45 

 Scales, 4, 10 

 Scapanus, pelvis, 274 



skull, 206 

 Scaphirhynchus, skull, 99 

 Scaphognathus, skull, 167 

 Scaphoid, 277 

 Scapho-lunatum, 292 

 Scapula, 229 

 Scapular region, 228 

 Schizognathous, 179 

 Sclera, 62 



Scleroblastic tissue, 2 

 Sclerotic bones, 170 

 Sclerotomes, 2, 19 

 Scomber, skull, 112 



visceral arches, 97 

 Scyllium, pectoral appendages, 228 

 Sella turcica, 63, 70 

 Sellar tubercle, 188 

 Semilunar bone, 277 

 Seps, pelvis, 265 

 Septal fenestra, 153 

 Septomaxillary bone, 75, 142 

 Septum, interorbital, 64 

 Sesamoid articulare, 78, 97 

 Seymouria, skull, 143 

 Shoulder blade, 229 

 girdle, 228, 245 

 Sinuses, 192 

 Siphoneum, 166 

 Siphonops, skull, 129 



vertebra, 40 

 Siren, pectoral girdle, 53 

 Sirenia, appendages, 300 



skull, 218 

 Skate, skull, 84 

 Skeleton, 9 



appendicular, 220 

 axial, 17 

 dermal, 9 

 visceral, 18 

 Skull, 57 



Amniota, 134 

 Amphibia, 119 

 Aves, 169 

 Cyclostome, 78 

 development, 59 



