XXII 



SCHEME OF THE CLASSIFICATION 



Order 1 8. COLKOPTERA 



" 19. HYMENOPTERA 

 Class V. ARACHNIDA . 

 Order i. ARANEIDA . 

 " 2. SCORPIONIDEA 

 " 3. PHALANGIDEA 



" 4. ACARINA 



PAGE 



360 



364 

 371 

 371 



377 

 379 

 379 



Orders. PEDIPALPI . 

 u 6. PALPIGRADI 

 " 7. SOLIFUG^E . 

 " 8. CHERNETIDIA 



" 9. XlPHOSURA . 



PAGH 



38' 

 382 



382 

 382 



383 



10. EURYPTERIDA . 384 



PHYLUM XI. CHORDATA 386 



Subphylum I. ENTEROPNEUSTA 386 



Order i. BALANOGLOSSIDA 386 



" 2. CEPHALODISCIDA . . . 386 



Subphylum II. TUNICATA 389 



Order i. ASCIDIACEA 391 



" 2. THALIACEA 393 



" 3. LARVACEA 393 



Subphylum III. CEPHALOCHORDA 393 



IV. VERTEBRATA 400 



Class I. CYCLOSTOMATA 414 



Subclass i. Myxinoidea 420 



" 2. Petromyzontia 420 



Class II. ELASMOBRANCHII 422 



Subclass i. Selachii 428 



Order i. SQUALI 428 



" 2. RAJI 429 



Subclass 2. Holocephali 430 



Class III. PISCES . 432 



Subclass i. Teleostomi 452 



Order i. CROSSOPTERYGII 452 



" 2. CHONDROSTEI 452 



" 3. HOLOSTEI 454 



" 4. TELEOSTEI 455 



Subclass 2. Dipnoi 471 



Class IV. AMPHIBIA 477 



Order i. APODA 512 



" 2. CAUDATA 513 



" 3. SALIENTIA 517 



