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BULLETIN 2 01, UNITED STATES NATIONAL MUSEUM 



Figure 82. — Acanthomysis columbieu (Tattersall) : a, Endopod of third thoracic limb, X 40; 

 b, endopod of eighth thoracic limb, X 40; c, fourth pleopod of male, X 40. From a 

 California specimen, for comparison with specimens from British Columbia (Tatter- 

 sall, 1933). 



