LIST OF ILLUSTRATIONS 



TEXT FIGURES 



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



description. By W. L. Schmitt. 



2. Diagrammatic views of a portunid crab, showing the terms used in desciip- 



tion. By W. L. Schmitt. A. Ventral. B.' Frontal. 



3. Carapace of a xanthid crab showing the principal areolations. After Dana. 



4. Carcinides maenas, male. Woods Hole, dorsal view. After R. Rathbun. 



5. Ovalipes ocellaius ocellatus, male, Woods Hole, dorsal view. After R. Rath- 



bun. 



6. Portunus {Portunus) sayi, male, natural size, dorsal view. 



7. Portunus {Portunus) sayi, outer maxilliped, enlarged. 



8. Portunus (Portunus) vocans, male (6930), carapace 23.5 mm. wide, dorsal 



view. 



9. Portunus (Portunus) vocans, male (6930), carapace 23.5 mm. wide, ventral 



view to show stridulating ridge. 



10. Portxinus (Achelous) spinimanus, male (61277), outer maxilHped, X 3. 



11. Portunus (Achelous) stanfordi, male, type, dorsal view, X 1.5. 



12. Portunus (Achelous) angustus, female, holotype, carapace 37.2 mm. wide, 



dorsal view. 



13. Portunus (Achelous) minimus, male, holotype, carapace 17 mm. wide, doisal 



view. 



14. Portunus (Achelous) iridescens, female, type, outer maxilliped, X 8. 



15. Callinectes, frontal outlines, a. sapidus. b. ornatus. c. sapidus acutidens. 



d. danae. e. marginatus. f. exasperaius. g. bocourti. h. arcuatus. i. toxotes. 

 k. bellicosus. 



16. Callinectes, abdominal outlines of male. a. ornatus. b. danae. c. sapidus. 



d. marginatus. e. bocourti. f. exasperaius. g. toxotes. h. arcuatus. i. 

 bellicosus. 



17. CaMtnedes, abdominal appendages of male. a. ornatus. b. danae. c. sapidus. 



d. marginatus. e. exasperaius. f. arcuatus. g. bellicosus. h. bocourti. 

 i. toxotes. 



18. Callinectes, abdominal outlines of female, a. sapidus. b. ornatus. c. mar- 



ginatus. d. danae. e. exasperaius. f. bocourti. g. arcuatus. h. toxotes. 

 (For bellicosus, see Fig. 20, Page 113.) 



19. Callinectes sapidus, male, Woods Hole, dorsal view. After R. Rathbun. 



20. Callinectes bellicosus, female abdomen. 



21. Telmessus cheiragonus, male, dorsal view, reduced. After Benedict. 



22. Telmessus cheiragonus. a. Female abdomen and sternum, b. Epistome. 



c. Bristle from carapace, enlarged. After Benedict. 



23. Erimacrus isenbeckii, male, dorsal view, reduced. After Benedict. 



24. Erimacrus isenbeckii. a. Female abdomen and sternum, b. Epistome. c. 



Bristle from carapace, enlarged. After Benedict. 



25. Peltarion dextrum, male, holotype, dorsal view, X 15/16. 



26. Tr achy car cinus spinulifer, male, holotype, dorsal view, X lYs- 



27. Same specimen, outer maxilliped, X 5. 



28. Acanthocyclus hassleri, male abdomen, X 2. 



29. Cancer irroratus, male, dorsal view, reduced. After R. Rathiaun. 



30. Cancer borealis, male, Casco Bay, dorsal view, reduced. After S. I. Smith. 



