vin 



ADDENDA. 



On page 167, to the description of Trapezium nipponicuiu, the foilowing lines 

 should be added : 



Two small left valves shoicn in ßgs. 12 and ISjjjlate VI, seem to be the younij forms 

 of this species. They are comj>a rati rely lonyer, with the surface-keel very sltarjj and more 

 or less spiny. 



Published July 7th, 1922. 



