ERRATA 



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For "oblique and" read "oblique, end". 



For "hing:e long" read "hinge line long". 



For "height i>4" read "height >^". 



For "fine ribs" read "fine riblets". 



For "p. 113" read "p. 118". 



Read "^Arca aviculoides Reeve". 



Omit "not". 



For "8 mm." read "7 mm." 



After "middle;" insert "posterior border deeply emarginated;". 



For "range" read "merge". 



For "? — A. firotracta Rogers ' read "}=A. protrada Rogers 1837". 



For " Daphoderma" veaA '' Dap/tnoderma" . 



For "about" read "almost". 



For "i 170" read "1770". 



For "apiicbus" and "approximatus" read "apicibus" and "approximatis" 



For "1806" read "1886". 



For 'ladocomata" read 'U'ctocomala'\ 



For "7-ioths" read "7-2oths". 



For "1682" read "1862" 



For " suleo subprti/ondo" read "stilco subprofundo" . 



Adual date of publication January j rst, igtj 



