Manchester Memoirs, Vol. LIV. {No. UV). 



CORRIGENDA AND ADDENDA. 



Page 2 line 22 for incequilateralis, Schlumberger read affixa, 

 Terquem. 

 ,,32 ,, 5 ,, intzquilateralis, Schlumberger read affixa, 

 Terquem. 



deep cells of which the walls are exceedingly 

 delicate ") ; 



