LIST OF CORRECTIONS 



Page 718, add to Fig. 3 : 



3 b. Posterior view of ventral valve, x 6. 

 3^. Summit view of dorsal valve. 2^. 



Page 787 and following, Plate I should read Plate LXI ; Plate II, LXII, 

 and so on until Plate VIII, which should read Plate LXVIII. 



[Proceedings of the National Museum, Vol. XIX.] 



