XXVI LIST Ol ENGRAVINGS. 



Fig. P^se 



180 Elements of Structure of the vertebra, (Carus) 351 



181 Skeleton of Hog, (Pander and D'Alton) 353 



182 Sternum, clavicle, and scapula ; human , 353 



184 Skeleton of Cyprinus carpio, (Bonnaterre) 366 



185 Diagram illustrating the progressive motion of Fishes. . . . 367 

 185* Path of the centre of gravity of a fish in swimming .... 369 



186 Front view of the vertebra of a Cod, {Gadus morrhua) . . 370 



1 87 Side view of the same 370 



188 Vertical and longitudinal section of a part of the spinal 



column in the same 370 



189 A similar section, showing the gradation of structure. . . . 370 



190 Similar section in the Squalus centrina, (Carus) 370 



191 Bones of the shoulder of the Lophius piscatorius, (id.) . . 376 



192 Pectoral fin of the Raia clavata, (id.) 376 



193 Belt of bones of the shoulder of a Ray, (id.) 377 



194 Muscular system of Cyprinus alburnus, (id.) 379 



195 Air bladder of Cyprinus carpio, (Blasius) 382 



196 Eggs of the Frog 389 



197 Side view of the Tadpole magnified, (Rusconi) 389 



198 Upper view of the same, (id.) 389 



199 Adult Frog 389 



200 Skeleton of Frog, (Cheselden) 393 



201 Skeleton of the Viper 398 



202 Ribs and spine of Boa constrictor (Home) 401 



203 Bones of the foot of the same, (Mayer) 399 



204 Muscles moving the claw of the same, (id.) 399 



205 Rudimental bones of the foot of the Tortryx scytale, (id.) 399 



206 of the Tortryx corallinus, (id.) 399 



207 of the Anguis fragilis, (id.) 399 



208 of the Amphisbcena alba, (id.) 399 



209 of the Coluber p?illutatus, (id.) 399 



210 Chalcides pentadactylus, (Bonnaterre) 399 



211 Under surface of the foot of the Lacerta gecko, magnified 



four times, (Bauer) 410 



212 Side view of a longitudinal section of the same, (id.) .... 410 



213 Skeleton of Tortoise, (Carus) 413 



214 Section of the thigh bone of the same, (id.) 413 



215 Hind view of skull of Testudo my das, (id.) 417 



216 Bones sustaining the fin of the Delphinus phocoena, (Pan- 



der and D'Alton) 431 



