Figures in Plate 279. 

 Fig. 



1. C. Atlantica, sp. 3, Ad. 8f See. — Hab. North Atlantic 

 Ocean. 

 2, 3. C. ciustata, sp. 2, Lianccus (Patella) C. fracjilis, Bory de 

 St. Vincent. C. Mediterranea, Deshayes. C. depressa, 

 Eoux. — The law of priority ought to be applied to every 

 well-ascertained Linnajan name, whatever difference of 

 opinion may exist about going further back. — Hab. 

 Mediterranean. 

 4. C. vitrea, sp. 1, Nautilus vitreus, Argenv. C. gracilis, 

 Reeve. — Ilab. Indian Ocean. 



