Kingdom— AISTIMALIA. 



* Organs arranged in pairs. 

 Sub-kingdom I. VEETEBEATA. 



Animals whicli possess an internal skeleton, of which a back-bone, 

 or vertebral column, composed of numerous joints, is always present. 

 Blood red; sexes distinct; limbs never exceed two pairs. 



^ PulmonatayTespiring hy lungs. 



Class 1. — MAMMALIA, blood warm.— Man, Beasts, Dugongs, 



Whales, &c. 

 „ 2. — AVES, blood warm. — Birds. 

 „ 3. — ^REPTILIA, blood cold. — Lizards, Snakes, Tortoises, 



Frogs, &c. 



ft Branchiata, respiring hy gills. 

 „ 4.— PISCES, blood cold.— Fish. 



SUB-KINGDOM II. ANNULOSA. 



Animals without an internal skeleton : protected externally by a 

 more or less hard articulated integument, and whose bodies and limbs 

 are divided into segments or joints. Blood colourless, cold. 



Class 1. — ARTICULATA. — Insects, Centipedes, Spiders, Crabs, Ac. 

 „ 2. — ANNULATA. — ^Worms, Leeches, Intestinal "Worms, &c. 



Sub-kingdom III. MOLLUSCA. 



Animals invertebrated, inarticulated, whose bodies are soft, and 

 usually protected by a hard, calcified shell. Blood colourless, cold. 



Class 1.— CEPHALOPODA.— Squid, Argonaut, Cuttle-fish, Nauti- 

 lus, &c. 



„ 2.— GASTEROPODA.— Periwinkle, Ear-shell, Land and Sea 

 Snails, &c. 



„ 3.— PTEROPODA.— Hyalsea, Clio, &c. 



„ 4.— BRACHTOPODA.— Lamp-shells, Lingula, &o. 



„ 5.— COJSrCHIFERA.- Oyster, Mussel, Cockle, &c. 



„ 6. — ^TTJNICATA. — Sea-squirts, Ascidians, Social Ascidians, &c. 



