392 ALLAX HAXCOCK 1' ACIFIC FX I'K DITIOXS VOL. 24 



PLATE 22 



Fig. 1. Pctiolisthes poiymitiis Glassell, male. Los Frailes, Gulf of 



California. 

 Fig. 2. Petrolisllu's cococjisis, n. sp., female paratype. Isla del Coco, 



Costa Rica. 

 Fig. 3. Prtrolist/irs liic.ns Nobili, male. Acapiilco, Mexico. 

 Fig. 4. Pt'trolisl/u's artijnms, ii. sp., male paratype. Punta Santa 



Elena, Ecuador. 



