apparatus of opercular pieces, which adheres to the posterior border 

 of the palatine and pterygoido-tympanal system, protects the branchiae, 



{j:^ (a) This is the pliiral of incus, the anvil of the ear. — Eng. Ed. 



(b) We are happy to be able to inform the reader, that we shall speedily give 

 him the opportunity of making this reference to a translation now about to be pub- 

 lished by the proprietor of the present work.— JBwjr. Ed 



