SECTION VI. 



THE CLASS OF BRACHIOPODA OR BRACHIOPODS. 



THE Brachiopoda get their r.anie from the two long 

 ciliated arms growing from the sides of the mouth, 



FIG. 658. FIG. 659. 



Brachiopod dorsal valve 

 with soft parts. 



Brachipod ideal side 

 view. 



by means of which they create currents in the water and 

 thus secure their food. The name from the Gr. Irach- 

 ion, an arm, andpous, a foot means arm-footed.* 



All the Brachiopods are marine, and are found, mostly, 



FIG. 660. FIG. 661. 



Terebratula septentrional is, Couth. 



Terebratula septentrionalis, Coutbouy. 

 Small specimen. New England and 

 northward. 



* There is a doubt as to the true affinities of the Brachiopods. Professor 

 Morse and many others regard them as Articulates (see foot note p. 370). 



