IX THE HISTORY AND SCOPE OF ZOOLOGY 339 



Sub-Branch 2. Anallantoidians. 

 Class I. BATKACHIANS. 



Orders : Anura, Urodela, Perennibranchia, 



Ccecilice. 

 II. FISHES. 



Section 1. Ossei. 



Orders : Acanthopterygii, Abdominales, Sub- 

 brachii, Apodes, Lophobranchii, Plecto- 

 gnathi. 

 Section 2. Chondropterygii. 



Orders : Sturiones, Selachii, Cyclostomi. 



Branch II. Entomozoa or Annelata. 

 Sub-Branch l. Arthropoda. 

 Class I. INSECTA. 



Orders : Coleoptera, Orthoptera, Neuroptera, 

 Hymenoptera, Lepidoptera, Hemiptera, Di- 

 ptera, Rhipiptera, Anopleura, Thysanura. 

 II. MYEIAPODA. 



Orders : Chilognatha and Chilopoda. 

 III. AUACHNIDS. 



Orders : Pulmonaria and Trachearia. 

 ,, IV. CRUSTACEA. 



Section 1. Podophthalmia. 



Orders : Decapoda and Stomopoda. 

 Section 2. Edriophthalmia. 



Orders : Amphipoda, Loemodipoda, and 



Isopoda. 

 Section 3. Branchiopoda. 



Orders : Ostracoda, Phyllopoda, and Tri- 



lobitce. 

 Section 4. Entomostraca. 



Orders : Copepoda, Cladocera, Sipkonostoma, 



Lernceida, Cirripedia. 

 Section 5. Xiphosura. 



(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. TTJRBELLARIA. 



