xxxviii CLASSIFICATION OF THE ANIMAL KINGDOM 



Phylum XL MOLLUSCA. 



Class I. PELECYPODA. 



Order 1. Protobraxchia. 



,, 2. FlLIBRANCHIA. 



„ 3. PsEUDO-LAMELLIBRAXCHIA. 



,, 4. EULAMELLIBRAXCHIA. 



Sub-order a. Integripalliata. 

 ,, b. Sinupal/iata. 



Order 5. Septibraxchia. 



Class II. AMPHINEUEA. 

 Order 1. Placophora. 

 ,, 2. Aplacophora. 



Class III. GASTEOPODA. 



Sub-class I. Streptoneura. 

 Order 1. Aspidobraxchia. 

 Sub-order 1. Docoylossa. 

 ,, 2. Rhipidogloasa. 



Order 2. Pectixibraxchia. 

 Sub-order 1. Platypodia. 

 ,, 2. Heteropoda. 

 Sub-class II. Euthyneura. 

 Order 1. Opisthobraxchia. 

 Sub-order 1. Tectihranchia. 

 ,, 2. Nudibranchia. 

 Order 2. Pulmoxata. 



Appendix to the Gastropoda- 

 SCAPHODA and RHODOPE. 



Class V. CEPHALAPODA. 



Sub-class I. Dibranchiata. 

 Order 1. Decapoda. 

 ,, 2. Octopoda. 

 Sub-class II. Tetrabranchiata. 



-Class 



Phylum XII. CHORDATA. 



Sub-phylum I. ADELOCHORDA. 



Class ADELOCHOEDA. 



Sub-phylum II. UROCHORDA. 



Class UEOCHOEDA. 



Order 1. Larvacea. 

 ,, 2. Thaliacea. 

 Sub-order a. Cyclomyaria. 

 ,, b. Hemimyaria. 



,, <:. Pyrosomata. 

 Order 3. Ascidiacea. 



Sub-order a. Ascidin' simplices. 

 ,, b. Ascidiw compotitiv. 



Sub-phylum III. EUCHORDA. 

 Section I. Acrania. 



Section II. Craniata. 



Class I. CYCLOSTOMATA. 



Order 1. Petromyzoxtes. 

 ,, 2. Myxinoidei. 



Class II. PISCES. 



Sub-class I. Elasmobranchii. 



Order 1. Cladoselachil 



,, 2. Pleuracaxthei. 



,, 3. Acaxthodei. 



4. Selachii. 



Sub-order a. Protosdachii. 

 ,, b. Euselachii. 



Section o. Squalida. 

 ,, 0. Rajida. 



Sub-class II. Holocephali. 



,, III. Teleostomi. 



Order 1. Crossopterygil 

 ,, 2. Chondrostei. 

 ,, 3. Holostei. 

 ,, 4. Teleostei. 

 Sub-order a. Physostomi. 



,, b. Anacanthini. 



,, c. Acanthopteri. 



, , d. Pharynyoijnath i. 



,, ft. Plectognathi. 



,, f. Lophobranchii. 



Sub-class IV. Dipnoi. 



Order 1. Moxopxeumoxa. 

 ,, 2. Dipxeumoxa. 



Appendix to Pisces — The Ostracodermi. 



Class III. AMPHIBIA. 

 Order 1. Urodela. 

 ,, 2. Antra. 

 ,, 3. Oymxophioxa. 

 4. Steoocephala. 



