XVlll INDEX. 



ORDER II. ACEPHALA NUDA (continued). 

 Balanus proper, 120 

 Acastae, 121 

 Coniae, 121 

 Asemae, 121 

 Pyrgomse, 121 

 Octhosiae, 121 

 Creusiue, 121 

 Coronulse, 121 

 Tubicinellse, 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. TUBICOLJE, 128 



Serpula, 128 



Spirorbis, 129 

 Sabella, 129 

 Terebella, 130 



Phyzeliae, 131 



Idaliae, 131 

 Amphitrite, 131 

 Syphostoma, 132 

 Dentalium, 132 



ORDER II. DORSIBRANCHIATA, 132 



Arenicola, 133 

 Amphinome, 133 



Chloeia, 134 



Pleione, 134 



Euphrosine, 134 



Hipponea, 134 

 Eunice, 134 



Marphisw, 135 



Lysidice, 135 



Agula, 135 

 Nereis, 135 



Nereiphylia, 136 



