16 



CLASSIFICATION. 



<^2. 



THIRD GROUP. 



VERMES. 



Animals with an elongated, symmetrical body, and whose organs are 

 arranged along a longitudinal axis; so that right and left, dorsal and 

 ventral aspects may be indicated. 



The central nervous mass consists of a cervical' ganglion, with or with- 

 out a chain of abdominal ganglia. 



Class VI. Helminthes. 

 Class VII. Turbellarii. 

 Class VIII. Rotatorii. 

 Class IX. Annulati. 



FOURTH GROUP. 



MOLLUSCA. 



Animals of a varied form, and whose bodies are surrounded by a fleshy 

 mantle. The central nervous masses consist of ganglia, some of which 

 surround the oesophagus, and others, connected by nervous filaments, are 

 scattered through the body. 



Class X. Acephala. 

 Class XI. Cephalophora. 

 Class XII. Cephalopoda. 



FIFTH GROUP. 



ARTHROPODA. 



Animals having a perfectly symmetrical form, and articulated organs 

 of locomotion. The central masses of the nervous system consist of a 

 ring of ganglia surrounding the oesophagus, from which proceeds a chain of 

 abdominal ganglia. 



Class XIII. Crustacea. 



Class XIV. Arachnida. 



Class XV. Insecta. 



BIBLIOGRAPHY, 



§2. 



Besides the various ancient and modern works upon general comparative 

 anatomy, — such as those of Blumenbach, ^^'' G. Cumer,^-' F. Meckel,^^^ E. 

 Home,^*' Blai?iville,^'^' Delle ChiaJe/'^Carus,'^'Grant,'^^^Ry7ner Jones, '^^^Straitss 



1 Hamltmch der vergleichenden Anatomie. Göt- 

 tinpen, 18vM. 



ü I/;(,-oiii) (i'Anatomie comparee. Paris, 1799- 

 1805. Trantiliit<'d into German and iiutilished with 

 note» and additions Ijy Meckel and Froriep. i vols. 

 I/eipr.iK, 1809-10. 2nd edit. Paris, 18155-^5. 



3 System der vergleichenden Anatomie. 6 vols. 

 Halle, 1821-33. 



* Lectures on Comparative Anatomy. 6 vols. 

 JiODdoD. 1814-29. 



' De I'Orpanisation des Animaux, ou Principe» 

 d'Anatomie compar*e. Tom. I. Paris, 1832. 



^ Istituzioni di Anotomiae Kisiologia Comparata. 

 Napoli, 1832. 



7 Lehrbuch der vergleichenden Anatomic. 2nd 

 ed. Leipzig, 1834. 



" Outlines of Comparative Anatomy. Ixindon, 

 1841. 



I' A General Outline of the Animal Kingdom, an<S 

 Maiiual of Coniparalive Anatomy London, 1841. 



