ERRATA. 



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104, thirteen lines from bottom, for " Balanus elongates" read " Bala?ius 



geleates." 



105, six lines from bottom, /or "Balanus elongates" read " Balanus galeatus" 

 1 74. Since the table on the distribution of the fossil species was drawn up, I 



have examined some more specimens, sent me by Mr. Wood, which 

 show that Balanus concavus and Hameri are found in the Red Crag ; 

 and that Verruca Stromia is found in the Coralline Crag ; this will 

 make the total in the Coralline Crag nine, and in the Red Crag eight. 

 I should, however, add, that the identification of Verruca Stromia 

 in the two Crags is a little doubtful, as the specimen was without the 

 opercular valves. 



235, to Fossil localities of Bal. concavus, add Red Crag (Sutton) Mus. S. "Wood. 



255, six lines from the top, Bal. crenates, I have now seen a single Red Crag 

 specimen *5 of inch in basal diameter. 



278, to Fossil localities of Bal. Hameri, add Red Crag (Sutton) Mus. S. Wood. 



293, nineteen lines from the toy, for " Cotantin," read " Cotentin." 



300, ten lines from bottom, for " parieted" read "parietal." 



