Order II.— ACEPHALA ^UDk—( co7itinued). 

 Balanus proper, 120 

 Acastse, 121 

 Coniffi, 121 

 Asemee, 121 

 Pyrgomae, 121 

 Octhosipe, 121 

 Creusise, 121 

 Coronulae, 121 

 Tubicinell*, 121 

 Daidema, 122 



THIRD GREAT DIVISION OF THE ANIMAL KINDGOM. 

 ANIMALIA ARTICULATA. 



Distribution of the Articulata into four Classes, 124. 



CLASSES. 



I. Annelides. I III. Arachnides. 



II. Crustacea. | IV. Insecta. 



CLASS I.— ANNELIDES. 

 Division of the Annelides into three Orders, 127. 

 Order I.— TUBICOLiE. 128 



Serpula, 128 



Spirorbis, 129 

 Sabella, 129 

 Terebella, 130 



Phyzeliae, 131 



Idalise, 131 

 Amphitrite, 131 

 Syphostoma, 132 

 Dentalium, 132 



Order II.— DORSIBRANCHIATA, 132 



Arcnicola, 133 

 Amphinome, 133 



Chloeia. 134 



Pleione, 134 



Euphrosine, 134 



Hipponoa, 134 

 Eunice, 134 



Marphissp, 135 



Lysidice, 135 



Agula, 135 

 Nereis, 135 



Nereiphylia, 136 



