U. S. NATIONAL MUSEUM ‘ : PROCEEDINGS, VOL. XV PL. XXxXI 
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Fig. 1. Libinia dubia Milne Edwards,  § of small male. 
Fig. 2. Libinia emarginata Leach, < } of small male. 
Fig. 3. Libinia mexicana, sp. nov., young 3, * 33. 
