ANATOMICAL SYSTEMS. 



331 



II. ENTOMOZA, OR ANNELLATA. 

 Sub-braiich. Arthropoda. 



CL. INSECTA. Orel. Coleoptera, Orthoptera, Neu- 

 roptera, Hymenoptera, Lepidoptera, Herniptera, Diptera, 

 Rhipiptera, Anopleura, and Thysanura. 



CL. MYRIAPODA. Ord. Chilognatha and Chilopoda. 



CL. ARACHNIDS. Ord. Pulmonaria and Trachearia. 



CL. CRUSTACEA. 1. Podophthalmia. Ord. . Deca- 

 poda and Stomopoda. 2. Edriophthalma. Ord. Amphi- 

 poda, Lsemodipoda, and Isopoda. 3. Brauchiopoda. 

 Ord. Ostrapoda, Phyllopoda, and Trilobitre. 4. Ento- 

 mostraca. Ord. Copepoda, Cladocera, Siphonostoina, 

 Lernaeida, Cirripedia. 5. Xiphosura. 



III. MALACOZOARIA, OR MOLLUSCA. 



Sub-branch. Ver~ 



ines. 



CL. ANNELIDS. 

 CL. HELMINTHS. 



CL. TURBELLARIA. 



CL. CESTOIDEA. 

 CL. ROTATOKIA. 



Sub-branch. Mollusks proper. 

 CL. CEPHALOPODS. 

 CL. PTEROPODS. 

 CL. GASTEROPODS. 



CL. ACEPHALA. 



Sub-branch. Molluscoids. 



CL. TUNICATA. 

 CL. BRYOZOA. 



Sub-branch. Radiaria, or Radiata. 

 CL. ECHINODERMS. 

 CL. ACALEPHS. 

 CL. CORALLARIA, Or POLYPI. 



IV. ZOOPHYTES. 



Sub-branch. Sarcodaria. 

 CL. INFUSORIA. 

 CL. SFONGIARIA. 



CLASSIFICATION OF VON SIEBOLD AND STANNIUS. 



This classification is adopted in the following work : SIEBOLD (C. TH. v.) 

 and STANNIUS (H.), Lehrbuch der vergleichenden Auatomie; Berlin, 1845, 

 2 vols. 8vo. A second edition is now in press. 



EVERTEBRATA. 

 I. PROTOZOA. 



CL. 1. INFUSORIA. Ord. Astoma and Somatoda. 

 CL. 2. RHIZOPODA. Ord. Monosoniatia and Polysomatia. 

 II. ZOOPHYTA. 



CL. 3. POLYPI. Ord. Anthozoa and Bryozoa. 



CL. 4. ACALEPH.E. Ord. Siphonophora, Discophora, Ctenophora. 



CL. 5. ECHINODERMATA. Ord. Crinoidea, Asterioidea, Echinoidea, 



Holothurioidea, and Sipunculoidea. 

 III. VERMES. 



CL. 6. HELMINTHES. Ord. Cystici, , ^5^fSS?t^S 



Cestodes, Trematodes, Acan- [ duced most important improve- 

 thocephali, Gordiacei. Neum- f ments iu the classification of the 



I Worms, and greatly increased our 

 tOClCS. knowledge of these animals. 



