Chap. III. ANATOMICAL SYSTEMS. 203 



CLASSIFICATION OF BURMEISTER. 



Tlic following diagram is conii)ilc(l fioiii the author's Gcschichte der Schopfung, Leipzig, 1843, 1 vol. 8vo. 



Type I. IiutF.r.uLAR Animals. 



1st Subtype. Cl. 1. Infusoria. 

 Type II. Regular Animals. 



2d Subtype. Cl. 2. P o 1 y p i n a . Ord. Bryozoa, Anthozoa. 

 3d Subtype. Cl. 3. Radiata. Ord. Acalephx', Echinodermata, Scytoderniata. 

 Type III. Symmf.trical Animals. 



4th Subtype. Cl. 4. Jlollusca. Ord. Perigymna (Tunicata) ; Cormopoda (Acephala) ; Brachio- 



poda, Ceplialophora (Pteropoda and Gasteropoda) ; Cej)halopoda. 

 5th Subtype. Arthrozoa. 



Cl. 5. Vermes. Ord. Helminthes, Trematodes, and Annulati. 



Cl. C. Crustacea. 1°. Ostracoderina. Ord. Prothesmia (Cirripedia, Siphono- 

 stonia, and Rotatoria) ; Aspidostraca (Entoniostraea : Lopliyropoda, Phyllojioda. 

 Pa^cilopoda, Trilobita-.) 2°. Malaco s t raca. Ord. Thoracostraca (Podoph- 

 fhalma) ; and Arthrostraca, (Edriophthalma.) 

 Cl. 7. A r a 0, h n o d a . Ord. Myriapoda, Arachnids. 



Cl. 8. I n s e c t a . Ord. Rhynchota, Synistata, Antliata, Piezata, Glossata, Eleutherata. 

 6th Subtype. Ostcozoa. (Vertebrata.) 

 Cl. 9. Pisces. 

 Cl. 10. Anii)hibia. 

 Cl. 11. Aves. 

 Cl. 12. Mammalia. 



The general arrangement of the classification of Burmeister recalls that of 

 (le Bhiinville ; only that the order is inverted. His three types correspond to the 

 three subkingdoms of de Blainville : the Irregular Animals to the Heterozoaria, the 

 Regular Animals to the Actiuozoaria, and the Symmetrical Animals to the Artiozo- 

 aria; while his subtypes of the Symmetrical Animals correspond to the types de 

 Blainville admits among his Artiozoaria, with this important improvement, however, 

 that tlio Midentozoaria are suppressed. Burmeister reduces, unhappily, the whole 

 branch of MoUusks to one single class. The Arthrozoa, on the contrary, in the 

 investigation of which Burmeister has rendered eminent service to science, are pre- 

 sented in their true light. In his special works,^ his classification of the Articulata 

 is presented with more details. I have no doubt that the correct views lie entertains 

 respecting the standing of the Worms in the branch of Articulata are owing to his 

 extensive acqutiintance with the Crustacea and Insects, and their metamorphoses. 



* These works are : Beitrage zur Naturgescliichte 1830. — Die Organisation der Trilobilen, aus ihren 



der Rankenfiisser, (Cirripedia,) Berlin, 1834, 1 vol. lebenden Verwandten entwickelt, Berlin, 1843, 1 vol. 



4to. — Handbuch der Entomologie, Berlin, 1832-47, 4to. ; Engl, by the Ray Society. London, 1S47, 



5 vols. 8vo. ; Engl, by W. E. Shuckard, London, 1 vol. fol. 



