LIST OF ENGRAVINGS. XXX1I1 



Fig. Page 



355 Organs of circulation in the Loligo sagittata, (id.) . . . 271 



356 Plan of circulation in Fishes 272 



357 Plan of circulation in Batrachia 274 



359 Plan of double, or warm-blooded circulation 278 



360 Heart of the Dugong, (Home) 279 



361 Valves of the Veins, (Cloquet) 288 



366 Heart, branchial artery and gills of a fish, (Blasius) . . 302 

 267 Branchial apertures in the Squalus ylaucus, (Bonna- 



terre) 302 



368 Branchial apertures in the Petromyzon marinus, (id.) 302 



369 Internal structure of the branchiae of the same, (Home) 302 



370 Stigmata in the abdominal surface of the Dytiscus 



marginalis, (Leon Dufour) 311 



371 Stigmata of Cerambyx heros, (Fab.) magnified, (id.) 311 



372 Longitudinal tracheae of Carabus auratus, (id.) 311 



373 Air vesicles and tracheae of the Scolia hortorum, (Fab.) 



highly magnified, (id.) 311 



374 Respiratory apparatus of the Scorpio europceus, (Tre- 



viranus) 315 



375 Internal structure of the lungs of the Turtle, (Bojanus) 322 



377 Air cells of the Ostrich, (Parisian Academicians) .... 328 



378 Lymphatic Absorbents 352 



379 Passage of Nerves through a ganglion 359 



380 Plexus of nerves 359 



381 Varieties of forms of antennas of Insects, (Goldfuss) 384 



382 Vertical and longitudinal section of the right nostril in 



man 400 



383 Vertical transverse section of the same 401 



384 Transverse section of the nostril of a Sheep, (Harwood) 402 



385 Turbinated bones of the Seal, (id.) 402 



386 Turbinated bones of the Turkey, (id.) 405 



387 Nerves distributed to the bill of the Duck, (id.) 406 



388 Nasal cavities of the Percafluviatilis, (Cuvier) 410 



389 Nasal cavity of the Raia batis or Skate, (Harwood) . . 410 



390 Human ear, (Cloquet) 421 



391 Posterior surface of the cavity of the tympanum, (id.) 425 



392 Ossicula auditus, or small bones of the tympanum . . 425 



393 The position of the latter in the tympanum 425 



VOL. i. c 



