PLATE LXIII. 



Figs. 1-3. — 2'estudo cultralus. One-balf uakiral size. Page 7G3. 



Figs. 1-2. — Parts of carapace and plastron of one individual. 



Fig. 1. — Rigbt lialf of lip of plastron viewed from above. 



Fig. 2. — Posterior part of left side of margin of carajiace, including tbe anal bone and iiart of tbe la.st 



marginal of tbe rigbt side. 

 Fig. 3. — Left half of lip of plastron of a second individual, sbowiug a fissured cbaracter, seen from 



above ; a, tbe external or internal side. 

 Fig. 4. — Left mandibular ramus of Sciuriis rorlmani, left side, natural size; a, tbe same from above. 



Page 816. 

 Fig. 5. — Sciurus hallorianus. Skull, from above, natural size; a, .second and tbird molars of rigbt side, 



from below, twice natural size. Page 818. 

 Fig. 6. — Sciurus balloHaiius. Rigbt ramus of mandible of skull above figured, natural size, external view ; 



a, .same from above, twice natural size. Page 818. 

 Figs. 7-10. — Meiiiscom !/s liijtpodHs. Several individuals. Page 828. 

 Fig. 7. — Base of cranium, natural size; several of tbe molar teetb are copied in from another specimen 



witb both series complete, and connected by a perfect palate. 

 Fig. 8. — Eight mandibular ramus of a second individual, natural size ; a, tbe same, iuuer'Bide; b, tbe 



same from above, twice natural size. 

 Fig. 9. — Rigbt superior molar series, twice natural size, from below ; a, external side. 

 Fig. 10. — Skull lacking all behind orbits of a fourth individual, natural size, right side; a, above; 6, 



front. 

 Fig. 11. — Meniscomys liolo})Iius. Left maxillary series of molars, twice natural size, from below; «, ex- 

 ternal side. Page 829. 

 Fig. 12. — Meniscomi/s carafua. An imperfect cranium seeji from below, natural size; n, from above. 



Page 830. 

 Fig. 13. — Left mandibular ramus of specimen figured as above, from outer side; <(, same, seen from 



above, twice natural size. 

 Fig. 14.— Superior molar teetb of tbe .same specimen, from below, twice natural size; a, external side. 

 Fig. 15. — lemur of the same specimen, from front, natural size. 

 Figs. 16-17. — ileniscomi/s nitens. Two individuals. Page 832. 



Fig. 16. — Second and third superior molars, twice natural size, from below ; a, external view. 

 Fig. 17.— Part of right mandibular ramus, natural size, inner side; a, the same, from above, twice nat- 

 ural size. 

 Figs. 18-21. — Castor jifninsulatus. Two individuals, natural size. Page 840. 

 Fig. 18. — Cranium from left side; n, same, from above; 6, from below; c, posterior view. 

 Figs. 19-21. — Portions of a second individual cut froju a single small block of matrix. 

 Fig. 19. — Eight ramus of maudible, external side; a, from above. 

 Fig. 20. — Right femur, front view. 

 Fig. 21. — Right tibia with part of shaft and peroneal process of distal extremity wanting, natural 



size, jjosterior view ; a, external side. 

 Fig. 22. — Castor gradatus. Skull, from above; n, from below, natural size. Page 844. 



