IX THE HISTORY AND SCOPE OF ZOOLOGY 339 



Sub-Branch 2. Anallantoidians. 

 Class I. Batrachians. 



Orders : Anura, Urodela, Perennibranchia, 

 Coecilice. 

 „ II. Fishes. 



Section 1. Ossei. 



Orders : Aca7itko2?ter7/(/n, Ahdominales, Suh- 

 hrachii^ Ajiodes, Lopliohranchii^ Plecto- 

 gnathi. 

 Section 2. Cliondropteryciii. 



Orders : Sturiones, Selachii, Cydostomi. 



Branch II. Entomozoa or Annelata. 

 Sub-Branch 1. Arthropoda. 

 Class I. Insecta. 



Orders : Coleoptera, Orthoptera, Neuroptera, 

 Hymenoptera, Lepidoptera^ Hemip>tera, Di- 

 ptera, EhipipUra^ Anopleura, Thysanura. 

 „ II. Myriapoda. 



Orders : Chilognatha and Chilopoda. 

 „ III. Arachnids. 



Orders : Pulmonaria and Trachearia. 

 „ IV. Crustacea. 



Section 1. Podophthalmia. 



Orders : Decapoda and 8tomop>oda. 

 Section 2. Edriophthabnia. 



Orders : Amphipoda^ Loemodipoda^ and 

 Isopoda. 

 Section 3. Brancliiopoda. 



Orders : Ostracoda, Phyllopoda, and Tri- 

 lohitce. 

 Section 4. Entomostraca. 



Orders : Coj^epoda, Cladocera, Sip)liono8toma, 

 Lernoiida, Cirripedia. 

 Section 5. Xiphomra. 



(The orders of the classes which follow are not given in the 

 work quoted.) 



Sub-Branch 2. Vermes. 



Class I. Annelids. Class IV. Cestoidea. 



„ II. Helminths. „ V. Rotatoria. 



„ III. Turbellaria. 



