512 BULLETIN 34, UNITED STATES NATIONAL MUSEUM. 



Fig. 17. Agalychnis moreletii, front of top of sknW. 



18. PhyllomedHsa iicolor, front of top of skull ; a, sternum. 



19. Hyla carolinensis, skull from above ; a, sternum. 



20. Scytopis venulosiis, front of top of skull; 1, ethmoid bone ; a, another speci- 



men, showing inequalities of surface and posterior outline of ethmoid bone. 



PLATE LXXIII. 



Hylidw, Hemiiiliractidw, Cystignathidw, and Pelobatidce. 



21. Osteocephalus pJaniceps, skull from above. 



22. Hyx)sil)oas crepitans, roof of m.o\it\i.. 



24. Trachyceplialus geographicus, skull from above ; from Steindachner. 



25. Triprion petasatus, head, side view. 



26. Triprion petasalus, head, from above. 



27. Triprion petasatus, interior of mouth. 



28. Cincloscoptis maximus, right manus; u and r, ulna and radius; u and r, ulnar 



and radial carpals ; c, central, 1-2-3-4-5 distal carpals, 4 and 5, con- 

 fluent ; 1-5 metacarpals ; I supporting a spinous poUex. 



29. Acris gryllus, right manus, four times natural size. 



30. Hylidce, distal phalanges ; No. 7, TrachycepliaJus marmoratm anterior and 



posterior; 8, Hyla carolinensis, do. ; 9, Scyto^nsvenulosus, do. ; 10, Hypsihoas 

 alhomarginatus, do. ; 11, Cincloscopus maximus, do., posterior attached to 

 penultimate iihalange ; 12, Hyla aurea, do ; 13, Phyllomedusa iicolor, do. ; 

 14, same, the external ungues of both pedes. 



31. Hemiphractus sciitatus, head from above, from Boulenger. 



32. Scaphiopns holbrooMi, right manus; lettering as in Fig. 28. 



33. Mixophyes fasciolatus, right manus, lacking the phalanges ; letters as in 



Fig. 28. 



34. Leptodactylus pentadactylus, left manus, the male showing process of second 



metacarpal, which is wanting in the female ( 9 ) ; lettering as in Fig. 28. 



PLATE LXXIV. 



Embracing Hemisido}, Brevicipitidce,Engystomid(x, Pliryniscidce, and Dendrohatida:. 



Fig. 1. Hemisus guttatum, skull, from above. 



la. HemisHs guttatum, skull, from left side, exhibiting the suprascapulo-prootic 

 articulation, and the small freely-moving suspensorium. 



2. Hemisus guttatum, sternum ; from Boulenger. 



3. Breviceps gihhosus; a, anterior part of top of skull from above ; h, end of muz- 



zle from front, displaying lateral premaxillaries between the premaxilla- 

 ries, the maxillaries, and the nares; c, vertebral column, less the first and 

 the sacrum, from below ; d, last lumbar vertebra, anterior extremity from 

 left side ; e, last lumbar vertebra, anterior extremity, from front. 



4. Phrynomantis bifasciatus, front of top of skull. 



5. Phrynomantis bifasciatus, symphysis mandibuli, from above. 



6. Phrynomantis bifasciatus, from front. 



7. Microhyla achatina, top of front, and anterior end of frontoparietal, showing 



dotted outline of ethmoid. 



8. Callula balteata, top of front, from above. 



9. Engystoma microps, top of front, from above. 



10. Cacopus systoma, top of front, from above, with profile of prefrontal bones. 



11. Diplopelma ornatum, top of front, one-half the frontoparietal remoA^ed to 



show the ethmoid. 



12. Diplopelma ornatum, symphysis mandibuli. 



13. Engystomidae (name mislaid). 



14. Hypopachus variolosus, top of skull; a, sternum. 



15. Stereocyclops incrassatus, top of skull, a, sternum. 



