544 HISTORY OF THE HUMAN BODY 



Order 3. Odontoholcse (Hesperornis; Lestornis). 

 Order 4. Eurhipidurae. 



Sub-Order i. Dromaeognathi. 



Section I. Struthiones (ostrich, casuary). 

 Section II. Aepiornithes (^piornis). 

 Section III. Apteryges * (Apteryx). 

 Section IV. Crypturi (tinamoo, Crypturus). 

 Section V. Gastornithes (Gastornis). 

 Sub-Order 2. Impennes (penguins). 

 Sub-Order 3. Euornithes [a recent group, begin- 

 ning in the Eocene], 



Section I. Desmognathae (ducks; herons; 

 eagles; hawks; owls; cuckoos; 

 kingfisher ; trogon ; parrot) . 



Section II. Schizognathae (grebes; loons; gulls; 

 snipes; grouse; quails; pigeons; 

 humming-birds ; woodpeckers ) . 

 Section III. .^Egithognathae (Passeres, a group 

 which includes over one-half of 

 the species of living birds). 

 Super-Class III. Mammalia. 

 Class V. Mammalia. 



Sub-Class I. Prototheria * [Ornithodelphia]. 



Order i. Pantotheria (Dromotherium; Amphilestes). 

 Order 2. Multituberculata (Ctenadon; Polymasto- 



don). 



Order 3. Monotremata * (Ornithorhynchus; Echid- 

 na). 



Sub-Class II. Eutheria. 

 Super-Order i. Didelphia [Marsupialia]. 

 Order I. Polyprotodontia (opossum; Thylacinus). 

 Order 2. Paucituberculata * (Ccenolestes). 

 Order 3. Diprotodontia (Petaurus; wombat; kan- 

 garoo). 



Super-Order 2. Monodelphia [Placentalia]. 

 Order i. Insectivora (moles; shrews; hedgehog). 

 Order 2. Cheiroptera (bats). 

 Order 3. Galeopithecidae * (flying lemur). 

 Order 4. Edentata. 



