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- 

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

 occasionally a mouth and gullet. 



CLASS I. GREGARINID^E.** 

 CLASS II. RHIZOPODA. 



Order i. Monera.** 



ii 2. Amcebea.** 



ii 3. Foraminifera. 



ii 4. Radiolaria (Polycystines, &c.) 



., 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. Presh- 



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



(Sertularia). 

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



Portuguese Man-of-war (Physalia). 



