PLATE IV. 



Fig. i. Grapsus strigosits Herbst, penultimate leg (breadth of carapace 45.5 mm.), natural size. 



Fig. 2. Grapsus maculatus Catesby, penultimate leg (breadth of carapace 46 mm.), natural size. 



Fig. 3. Grapsus maculatus gracilipes H. Milne-Edwards, penultimate leg (breadth of carapace 37 mm.), 



nat. size. 

 Fig. 4. Grapsus strigosits longitarsis Dana, young rf , magn. 2' 4 . Fig. 4a penultimate leg, magn. 5. 

 Fig. 5. Ptycliognathus altimanus (Rathbun), rj 1 , magn. 2. Fig. 5« chela, outer view, magn. 2. Fig. 5^ 



exteaial maxillipeds of rf , magn. 2. Fig. 5c external maxillipeds of 9. magn. 3. Fig. $d abdomen 



of cf, magn. 2. 

 Fig. 6. "Ptychognathus guijulugam Rathbun, rf, magn. 2 ! / 2 . Fig. 6a front, dorsal view, magn. 5. Fig. 6b 



chela, outer view, magn. 3. Fig. 6c external maxillipeds, magn. 3. Fig. 6d abdomen, magn. 3. 



