4 88 



CLASSIFICATION OF ANIMALS 



Order. Acipenseroidei, e.g. Acipenser. 



Order. Amioidea, e.g. Amia. 



Order. Lepidosteoidei, e.g. Lepido- 



steus. 

 Order. Teleostei, e.g. Gadus, Amiurus, 



Ipnops, Periophthalmus, 

 Fierasfer, Gobiesox, Ambly- 

 opsis, Lucifuga, Solea, Exo- 

 ccetus, Edriolychnus. 

 Dipnoi, e.g. Ceratodus, Lepidosiren, 

 Protopterus, Dipterus. 

 Amphibia. 

 Labyrinthodontia * (Stegocephalia), 

 Embolomeri, e.g. Eogyrinus, 

 Loxomma. 

 Urodela, e.g. Triton, Salamandra, 



Proteus, Siren. 

 Anura, e.g. Rana, Pipa, Rhino- 

 derma, Alytes, Hylambates. 

 Gymnophiona, e.g. Ichthyophys, 

 Hypogeophys. 

 Amniota. 

 Reptilia. 

 tCotylosauria * e.g. Seymouria. 

 Sauropsida. 

 tChelonia, e.g. Testudo, Chelone, 

 Sphargis, Eunotosaurus, Tri- 

 assochelys. 

 Parapsida. 

 Squamata. 



Lacertilia, e.g. Lacerta, Vara- 

 nus, Uromastix, Gecko, 

 Anguis, Chalcides, Scincus, 

 Amphisbaena, Chamaeleo, 

 Mosasaurus. 

 Ophidia, e.g. Vipera. 

 Ichthyosauria, e.g. Mixosaurus, 

 Ichthyosaurus, Ophthalmo- 

 saurus. 

 Diapsida. 



Rhynchocephalia, e.g. Spheno- 



don (? Thalattosaurus). 

 Crocodilia. 

 Pseudosuchia,* e.g. Eupark- 



eria. 

 Thallatosuchia,* e.g. Geosau- 



rus. 

 Eusuchia, e.g. Crocodilus. 



t The Cotylosauria and Chelonia are often grouped together as 

 Anapsida. 



Subclass. 



Class. 



Order. 



Suborder. 



Order. 



Order. 



Order. 



Grade. 



Class. 



Subdivision 



Subdivision 



Order. 



Group. 



Superorder 



Order. 



Order. 



Superorder and Order. 



Group. 

 Order. 



Order. 

 Suborder. 



Suborder. 



Suborder. 



