Hotrs an tbc §rhislj |urassit 



Paet I. 



By J. W. D. MARSHALL. 



BEFORE we proceed to the consideration of the Bra- 

 chiopoda found in the Jurassic rocks of this country, 

 I purpose making a few general remarks on the Brachiopoda 

 as a class.* 



This course will probably help to make clearer some of 

 the points to which I shall presently direct your atten- 

 tion. 



In these preliminary observations, how^ever, I shall, as 

 far as possible, avoid dealing with " the anatomy of the 

 animal," or "the microscopic structure of the shell" which 

 protects it. These subjects are very technical, and for 

 our present purpose may be left almost entirely out of 

 consideration. 



Space will not permit of my entering into any great 

 detail, and this must be my apology for the incomplete- 

 ness of these preliminary remarks. 



First, then, as to the origin of the term Brachiopoda, 

 as proposed by Cuvier in 1805, which has since been 

 very generally adopted. It is derived from the Greek 



* British only. 



