LIST OF ILLUSTRATIONS. 



TEXT FIGURES. 



Page. 



1. Diagrammatic dorsal view of a grapsoid crab, showing the terms used in 



description 4 



2. Diagrammatic ventral view of a grapsoid crab, showing the terms used in 



description 5 



3. Trizocarcinits dentatus, ventral view of left side of carapace of male holo- 



type, showing stridulating ridge, X 4 18 



4. Bathyplax typhla, male (9729). a, Outer maxillipeds, showing approxima- 



tion, X 4; 6, abdomen and part of sternum, X 3; c, left chela, X 2 20 



5. Pilumnoplax americana, male, station 62, dorsal view, X 1 J 22 



6. Pilumnoplax americana, male, station 62, anterior portion of carapace, 



viewed from before, X 3J 22 



7. Goneplax hirsuta, cotype. X 2J. a, Dorsal view; b, right chela and carpus, 



outer view. (After Borradaile.) 28 



8. Prionoplaxatlantica, male, holotype. a, Abdomen and part of sternum, X 8; 



b, outer maxilliped, dotted line marking median axis, X 12 30 



9. Tetraplax quadridentata, male (24564), outer maxillipeds, showing approxi- 



mation, X 8 33 



10. Tetraplax quadridentata, male (24564), abdomen, part of sternum, and coxa 



of last leg, X 6$ 33 



11. Euryplax nitida, male (15012). a, Abdomen and part of sternum, X 3J; 



6, outer maxilliped, dotted line marking median axis, X 5$ 34 



12. Chasmophora macrophthalma, female holotype. a, Carapace, eyes, and an- 



tennae, dorsal view. X 5; 6, right chela, outer view, X 7J 38 



13. Chasmophora macrophthalma, anterior view of orbit of female holotype, show- 



ing hiatus in which lies the antennal flagellum, X about 13 38 



14. Speocarcinus granulimanus, male holotype. a, Abdomen and part of ster- 



num X 3; b, outer maxillipeds, showing approximation, X 5J 40 



15. Speocarcinus granulimanus, male holotype, right chela, outer view, X 2J. . 40 



16. Speocarcinus calif orniensis, male (32966). a, Outer maxilliped, dotted line 



marking median axis, X 4$; 6, abdomen and part of sternum, X 2$ 42 



17. Pseudorhombila octodentata, male holotype. a, Right chela, outer view, 



X 1; b, abdomen, part of sternum, and coxa of last leg, X 1$ 43 



18. Pseudorhombila octodentata, male holotype, outer maxillipeds, showing ap- 



proximation, X 3 43 



19. Oediplax granulata, female holotype. a, Antennal and buccal region, X 2; 



6, right chela, outer view, X 1 J 44 



20. Cyrtoplax spinidentata, male holotype, outer maxillipeds, showing approxi- 



mation, X 6 46 



21. Panoplax depressa, male (25624). a, Outer maxilliped, X 9; b, abdomen 



and part of sternum, X 6 48 



22. Eucratopsis crassimanus, female (17801), outer maxilliped, X 8 53 



23. Chasmocarcinus typicus, male holotype. a, Dorsal view, X 2; 6, abdomen 



and sternum, flattened, X 2 55 



XIII 



