APPENDIX. 



TABULAR VIEW OF THE CHIEF DIVISIONS 

 OF THE ANIMAL KINGDOM. 



(Extinct groups are marked with an asterisk. Groups not represented 

 at all as fossils are marked with two asterisks. ) 



INVERTEBRATE ANIMALS. 

 SUB-KINGDOM I. PROTOZOA. 



Animal simple or compound ; body composed of "sarcode," not de- 

 gmented ; no nervous sy 

 lly a mouth and gullet. 



finitely segmented ; no nervous system ; and no digestive apparatus, beyond 

 occasionall 



CLASS I. GREGARINID^E.** 

 CLASS II. RHIZOPODA. 



Order I. Monera.** 



ii 2. Amcebea.** 



it 3. Foraminifera. 



ii 4. Radiolaria (Polycystines, &c.) 



n 5. Spongida (Sponges). 

 CLASS III. INFUSORIA.** 



SUB-KINGDOM II. CCELENTERATA. 



Animal simple or compound ; body-wall composed of two principal 

 layers ; digestive canal freely communicating with the general cavity of the 

 body ; no circulating organs, and no nervous system or a rudimentary one ; 

 mouth surrounded by tentacles, arranged, like the internal organs, in a 

 " radiate " or star-like manner. 



CLASS I. HYDROZOA. 



Sub-class I. Hydroida (" Hydroid Zoophytes"). Ex. 'Fresh- 



water Polypes,** Pipe - corallines (Tubularia), Sea - Firs 



(Sertularia). 

 Sub-class 2. Siphonophora** ("Oceanic Hydrozoa"). Ex. 



Portuguese Man-of-war {Physalia}. 



