354 BULLETIN OF THE 



des decouvertes ulterieures ne conduisent a un systeme encore plus 

 naturel et plus satisfaisant." 



The Ophiothrix violacea of the Caribbean is said to be different from 

 the similar form found on the coast of South Brazil. This is to be 

 taken with great caution, considering that many Caribbean species go as 

 far. Nevertheless, as pointed out in the Introduction to this Bulletin, 

 there are also species apparently peculiar to the Brazil coast. 



Cambridge, November, 1869. 



