LIST OF ILLUSTRATIONS. 



TEXT FIGURES. 



Page. 



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



description 4 



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



description 5 



3. Trizocarcinus 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 3i 22 



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



outer view. (After Borradaile.) 28 



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



6, outer maxiUiped, dotted line marking median axis, X 12 30 



9. Tetraplax quadridentata, male (24564), outer maxillipeds, showing appi'oxi- 



mation, X 8 33 



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



of last leg, X 6f 33 



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



b, outer maxilliped, dotted line marking median axis, X 5| 34 



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



tennae, dorsal view, X 5|; b, right chela, outer view, X 7J 38 



13. Chasmophora macrophthalmxi, anterior view of orliit of female holotype, show- 



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



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



num X 3; 6, outer maxillipeds, showing approximation, X 5^ 40 



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



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



marking median axis, X 4^; b, abdomen and part of sternum, X 2^ 42 



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



X 1; 6, abdomen, part of stemiun, 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, Anteimal and buccal region, X 2i; 



b, right chela, outer view, X li 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 stemiun, flattened, X 2 55 



XIII 



