CLASSIFICATION OF ANIMALS 



171 



Phylum, Echinodermata 



Subphylum, Pelmatozoa 

 Class, Cystoidea ^ 

 Class, Blastoidea ^ 

 Class, Crinoidea 



Subphylum, Asterozoa 

 Class, Asteroidea 

 Class, Ophiuroidea 



Subphylum, Echinozoa 

 Class, Echinoidea 

 Class, Holothuroidea 



Phylum, Mollusca 

 Subphylum, Isoplcura 



Class, Amphineura 

 Subphylum, Prorhipido- 

 glossomorpha 

 Class, Gastropoda 

 Class, Scaphopoda 

 Class, Pelecypoda 

 Subphylum, Siphonopoda 

 Class, Cephalopoda 



Phylum, Arthropoda 



Subphylum, Branchiata 

 Class, Crustacea 



Subphylum, Tracheata 

 Class, Onychophora 

 Class, Myriapoda 

 Class, Insecta 



Subphylum, Arachnida 

 Class, Arachnida 



Phylum, Chordata 



Subphylum, Hemichorda 

 Subphylum, Urochorda 

 Subphylum, Cephalochorda 

 Subphylum, Vertebrata 

 Superclass, Pisces 

 Class, Agnatha 

 Class, Chondrichthyes 

 Class, Osteicthyes 

 Superclass, Tetrapoda 

 Class, Amphibia 

 Class, Reptilia 

 Class, Aves 

 Class, Mammalia 

 Subclass, Prototheria 

 Subclass, Allotheria^ 

 Subclass, Theria 



Further subdivisions of 

 the Theria are as fol- 

 lows: 



Superorder, Pantotheria ^ 

 Superorder, Metatheria 

 Superorder, Eutheria 

 Order, Edentata 

 Order, Cetacea 

 Order, Carnivora 

 Order, Ungulata 

 Order, Chiroptera 

 Order, Insectivora 

 Order, Rodentia 

 Order, Primates 



3 Extinct. 



The names here adopted are mostly those preferred by a majority of (he 

 consulted in a recent survey. 



prepared for Section F, Am. Assn. Adv. Science, Duke Univ. Press, 1936.) 



