11. SUBKINGDOM ARTICULATA. 



General Characteristics. — The Articulates (jointed) 

 constitute more than four-fifths of the Animal Kingdom. 



Mg. She. 



An Articulate. 



The body is composed of a series of rings, formed of skin 

 more or less hardened and serving for a skeleton (Table, p. 13). 



J/,7. 



Nervous System of Insects. 



Each segment generally has its nervous ganglion, which acts 

 independently as a kind of local brain. 



I- 



— ' o 



o S 



WHITE; 

 Jointed 



L1MB3. 



. RED; 



Class. 



INSECTA. 



■ Respiration bt TRACHE.a! oh pulmonary 



SACS. 



Classes. 

 Insecta, Insects. 



Respiration A^nATic, usually by gills; } „ ^ 



' LEGS MORE THAN EIGHT. \ C™tacea, Zob.Ur,, elc. 



Without jointed limbs. 



, insecra Uz,-,«, ^(c. 

 j" proper, ) 



• Segments and limbs NUMEROns, wingless. Myriapoda, Centipedes, etc, 



Distinct head, thorax, and abdomen ; 

 winged, legs six. 



Vermes, Worme. 



SUB-CLAaSBS. 



Insecta 

 proper. 



Head and thobai united, legs bight, 

 wingless. 



> Arachnlda, Spiders. 



