CONTENTS. 



Page 



Sub-Sect II. The Order of Urodela, or Tailed Batrachians 313 



III. The Order of Apoda, or Csecilians . . 317 



SECT. V. THE CLASS OF FISHES 318 



Sub-Sect I The Order of Acanthopterygians . . . 326 



II. The Order of Abdominal Malacopterygians 341 



III. The Order of Sub-brachian Malacopterygians 348 



IV. The Order of Apodal Malacopterygians . 351 

 V. The Order of Lophobranchiates . . 352 



VI. The Order of Plectognathes . . . -353 



VII. The Order of Sturiones .... 355 



VIII. The Order of Plagiostomi, or Selachians . 356 



IX. The Order of Cyclostomes, or Suckers . 359 



CHAPTER III. 



THE BRANCH OF ARTICULATA, OR ARTICULATES . . 361 



SECT. I. THE CLASS OF INSECTS 361 



Sub-Sect. I. Hymenoptera, or Bees, etc 369 



II. Lepidoptera, or Butterflies and Moths . 381 



III. Diptera, or Flies, etc 412 



IV. Coleoptera, or Beetles .... 420 

 V. Hemiptera, or Bugs, etc. .... 435 



VI. Orthoptera, or Grasshoppers, etc. . . 443 



VII. Neuroptera, or Dragon-Flies, etc. . . 449 



VIII. The Order of Arachnida, or Spiders . . 455 



IX. The Order of Myriapoda, or Centipedes . 458 



SECT. II. THE CLASS OF CRUSTACEA, OR CRUSTACEANS 460 



Sub-Sect I. The Order of Decapods . . . .461 



II. The Order of Tetradecapods . . . 464 



III. The Order of Entomostracans . . . 465 



SECT. III. THE CLASS OF WORMS 466 



Sub-Sect. I. The Order of Annelides .... 467 



II. The Order of Nematoids .... 468 

 III. The Order of Trematods . . . .468 



CHAPTER IV. 



THE BRANCH OF MOLLUSCA, OR MOLLUSKS . . . 470 



SECT. I. THE CLASS OF CEPHALOPODA, OR CEPHALOPODS 471 



Sub-Sect. I. The Order of Dibranchiata . . . .472 



II. The Order of Tetrabranchiata 47^ 



