180 BULLETIN 103, UNITED STATES NATIONAL MUSEUM. 



PLATE 56. 

 Gatunia proavita, holotype. 



"Fio. 1. Anterior view, X . 

 2. Posterior view, X . 



x 

 PLATE 57. 



Fin. 1. Natantiu, indeterminable, lateral view of pleou. X 2. 



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



cheliped, X 3. 



3. Impression of same. 



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



cheliped, X 3. 



5. Upper view of same. 



. Leucosilia bantmcnsis Rathbun, paratype , arm joint, X 3. 



7. Leucosilia banancnsis, paratype b, arm joint, X 3. 



8. Leucosilia banancnsis, holotype, arm joint, X 3. 



9. Macrobrachium-?, species, Cat. No. 324248, segment of large cheliped, 



X 33. 



10. Axiitst, species, Cat. No. 324250, scaphocerite, X 3J. 

 .11. Goniochcle"! 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 3*. 



14. Dorsal view of same, X 3. 



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



X 34. 



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



view, X 3i. 



17. Nephrops costatus, paratype 6, dactylus of left cheliped, dorsal view, 



X 3$. 



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



X 3i. 



19. Inner view of same, X 3J. 



20. Ventral view of same, X 3i 



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



view, X 34. 

 "22. Dorsal view of same. 



23. Pachycheles latus, paratype, left chela, dorsal view, X 3i. 



24. Calappa 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 3}. 



26. Dorsal view of same, X 3i. 



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



PLATE 58. 



FIG. 1. Calappella quadrispina Rathbun, holotype, impression of carapace, X 3. 



2. Carapace of figure 1, X 3. 



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



X 3i. 



