375 
AL Py BON. alike 
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. 
Crass I. GREGARINID/.** 
Cuiass II. RHIZOPODA. 
Order 1. Monera.** 
n 2. Amebea.** 
n 3. Foraminifera. 
» 4. Radiolaria (Polycystines, &c.) 
n 5. Spongida (Sponges). 
Crass IIT. INrusorra:** 
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 ora rudimentary one ; 
mouth surrounded by tentacles, arranged, like the internal organs, in a 
‘*radiate”’ or star-like manner. 
Crass I, Hyprozoa. 
Sub-class 1. Hydroida (** Hydroid Zoophytes’’). x. Fresh- 
water Polypes,** Pipe-corallines (Zwudularia), Sea - Firs 
(Sertularia). 
Sub-class 2. Siphonophora** (‘Oceanic Hydrozoa”). £x. 
Portuguese Man-of-war (Physalia). 
