xxu 



SCHEME OF THE CLASSIFICATION 



Order 1 8. Coleoptera 



" 19. Hymenoptera 

 Class V. ARACHNIDA . 



Order 1 . Araneida . 



" 2. SCORPIONIDEA 



u 3. Phalangidea 



u 4. ACARINA 



Phylum XL CHORD ATA 386 



Subphylum I. ENTEROPNEUSTA 386 



Order 1. Balanoglossida 386 



" 2. Cephalodiscida 386 



Subphylum II TUNICATA 389 



Order 1. Ascidiacea 391 



" 2. Thaliacea 393 



" 3. Larvacea 393 



Subphylum III. CEPHALOCHORDA 393 



*». " IV. VERTEBRATA 400 



Class I. CYCLOSTOMATA 414 



Subclass 1. Myxinoidea 420 



" 2. Petromyzontia 420 



X " Class II. ELASMOBRANCHII 422 



Subclass 1. Selachii 428 



Order 1. Squali 428 



" - 2. Raji •. . 429 



Subclass 2. Holocephali 430 



Class III. PISCES 432 



Subclass 1. Teleostomi 452 



Order 1 . Crossopterygii 452 



" 2. Chondrostei 452 



" 3. holostei 454 



" 4. Teleostei 455 



Subclass 2. Dipnoi 471 



X Class IV. AMPHIBIA • • 477 



Order 1. Apoda 512 



" 2. Caudata 513 



" 3. Salientia 517 



