180 BULLETIN 103, UNITED STATES NATIONAL MUSEUM. 



Plate 56. 



Gatunia proavita, holotype. 



Fig. 1. Anterior view, X §. 

 2. Posterior view, X f. 



Plate 57. 



Fig. 1. Natantia, indeterminable, lateral view of pleon. X 2. 



2. Axius reticulatus Rathbun, holotype, outer view of propodus of left 



cheliped, X 3. 



3. Impression of same. 



4. MacrobracJiium, species, Cat. No. 324256, outer view of propodus of left 



cheliped, X 3. 



5. Upper view of same. 



6. LeucosUia bananensis Rathbun, paratype a, arm joint, X 3. 



7. LeucosUia bananensis, paratype b, arm joint, X 3. 

 S. LeucosUia bananensis, holotype, arm joint, X 3. 



9. MacrobracJiium?, species, Gat. No. 324248, segment of large cheliped, 

 X 31. 



10. Axius?, species, Cat. No. 324250, scaphocerite, X 31. 



11. Gonioclielel armata Rathbun, holotype, outer view of dactylus of left 



cheliped, X 2. 



12. Lower view of same, X 2. 



13. Nephrops costatus Rathbun, holotype, dactylus of left cheliped, inner 



view, X 31. 



14. Dorsal view of same, X 31. 



15. Nephrops costatus, paratype a, dactylus of left cheliped, dorsal view, 



X 31. 



16. Nephrops costatus, paratype c, propodal finger of left cheliped, dorsal 



view, X 34. 



17. Nephrops costatus, paratype b, dactylus of left cheliped, dorsal view, 



X 34. 



18. Petrolisthes avitus Rathbun, holotype, palm of left cheliped, dorsal view, 



X 31. 



19. Inner view of same, X 31. 



20. Ventral view of same, X 3-J. 



21. Pachycheles latus Rathbun, holotype, propodus of left cheliped, ventral 



view, X 31. 



22. Dorsal view of same. 



23. Pachycheles latus, paratype, left chela, dorsal view, X 31. 



24. Galappa costaricana Rathbun, holotype, portion of propodus of left 



chela, outer view, X 3. 



25. Nephrops, species, Cat. No. 324249, dactylus of right cheliped, prehensile 



edge, X 31. 



26. Dorsal vieM' of same, X 31. 



27. Mursilia ecristata Rathbun, holotype, right cheliped, outer view, X 3. 



Plate 58. 



Fig. 1. Galappella quadrispma Rathbun, holotype, impression of carapace, X 3. 



2. Carapace of figure 1, X 3. 



3. Panopeus antetnirpureus, Rathbun, holotype, dactylus of right cheliped, 



X 31. 



