PRINCIPAL SYSTEMS OF ZOOLOGY 231 



the Myriapods and Arachnids. Respecting the Fishes, I refer to my 

 remarks in the first section of this Chapter, 



CLASSIFICATION OF MILNE-EDWARDS 



The following diagram is drawn from the author's Cours dlementaire d'Histoire 

 naturelle (7th ed., Paris, 1855), in which he has presented the results of his latest 

 investigations upon the classification of the Vertebrata and Articulata; the minor sub- 

 divisions of the Worms, MoUusks, and Zoophytes, however, are not considered in this 

 work. 



I. OsTEOzoARiA, or Vertebrata. 

 Subbranch. Allantoidians. 

 Cl. Mammalia. 1°. Monodelphya. a. Propria. Ord. Bimana, Quadrumana, Cheiroptera, 



Insectivora, Rodentia, Edentata, Carnivora, Amphibia, Pachydermata, Ruminantia. 



b. Pisciformia. Ord. Cetacea. 2°. Didelphya. Ord. Marsupialia, Monotremata. 

 Cl. Birds. Ord. Rapaces, Passeres, Scansores, Gallinae, Grallae, and Palmipedes. 

 Cl. Reptiles. Ord. Chelonia, Sauria, Ophidia. 



Subbranch. Anallantoidians. 



Cl. Batrachians. Ord. Anura, Urodela, Perennibranchia, Caeciliae. 



Cl. Fishes. 1°. Ossei. Ord. Acanthopterygii, Abdominales, Subbrachii, Apodes, Lopho- 



branchii, and Plectognathi. 2°. Chondropterygii. Ord. Sturiones, Selachii, and Cyclo- 



stomi. 



II. Entomozoa, or Annellata. 

 Subbranch. Arthropoda. 

 Cl. Insecta. Ord. Coleoptera, Orthoptera, Nevroptera, Hymenoptera, Lepidoptera, 



Hemiptera, Diptera, Rhipiptera, Anoplura, and Thysanura. 

 Cl. Myriapoda. Ord. Chilognatha and Chilopoda. 

 Cl. Arachnids, Ord. Pulmonaria and Trachearia. 

 Cl. Crustacea. 1°. Podophthalmia. Ord. Decapoda and Stomapoda. 2°. Edriophthalma. 



Ord. Amphipoda, Laemodipoda, and Isopoda. 3°, Branchiopoda. Ord. Ostrapoda, 



Phyllopoda, and Trilobitae. 4°. Entomostraca. Ord. Copepoda, Cladocera, Siphono- 



stoma, Lernaeida, Cirripedia. 5°. Xiphosura. 



Subbranch. Vermes. 



Cl. Annelids. 

 Cl. Helminths, 

 Cl. Turbellaria. 

 Cl. Cestoidea. 

 Cl. Rotatoria. 



III. Malacozoaria, or Mollusca. 

 Subbranch. MoUusks proper. 

 Cl. Cephalopods. 

 Cl. Pteropods. 

 Cl. Gasteropods. 

 Cl. Acephala. 



Subbranch. Molluscoids. 

 Cl. Tunicata. 

 Cl. Bryozoa. 



