ZOOLOGY. 



Div. II.— MOLLUSCA. 



Soft, invertebral, inarticulate animals, often protected by a shell. 



Class. 

 I. Cephalopoda . 

 Head-footed. 



II. Pteropoda 



Fin-footed. 



III. Gasteropoda ., 

 Belly-footed. 



IV. ACEPHALA 



Headless. 



V. Brachiopoda 



Arm-footed. 



VI. CiRRHOPODA 



Bristle-footed. 



I (One.) Brachiopoda. Lingula. 

 I (One.) Cirrhopoda. Barnacle. 



Div. III.— ARTICULATA. 



Animals with bodies covered with a case divided into rings. 



I. Annelida ' 



Ring-bodied animals. 



{■; 



Tubicola. Wormshell. 



Dorsibranchia. Lobworm. 

 Abranchia. Earthworm. 



II. Crustacea, 

 Crustaceous 

 animals. 



I. Malacostracia,^ 

 Crustaceous-shelled. ' 



II. Entomostracia, 

 Thin-shelled. 



III. Akachnida 



The Spider-tribe. 



IV. Insecta ... 

 Insects. 



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