508 BULLETIN 34, UNITED STATES NATIONAL MUSEUM. 



PLATE LIV. 

 Digestive apparatus of Salientia 



Fig. 1. Pelobates fuscus. 



2. Pseudis paradoxa, larva. 



3. Pleurodema bihroni; py, pylorus. 



4. Ceratophrys dorsata. 



5. Leptcdaotylus typhonius. 



6. Engystoma microps. 



PLATE LV. 



Viscera of Salientia. 

 Fig. 1. Bufo melanostictua. 



2. Hyla coeruha. 



3. Phyllomedusa Mcolor. 



4. Hemisus guineense. 



5. Breviceps gibbosus. 



7. Eana catesbiana. 



PLATE LVI. 



Brains of Batrachia, chiefly Salientia, natural size or enlarged two diameters. 



Fig. 1. Necturua maculatus, right ventricle exposed ; a, roof of mesencephalon re- 

 moved; b, floor of mesencephalon enlarged. 



2. Hemisalamandra cristata, from above ; a, sagittal section of mesencephalon ; 



b, prosencephalon, right ventricle exposed ; c, floor of mesencephalon, 

 showing commissure c' and cerebellum, epe, and fourth ventricle, iv ; d, 

 commissure from behind; p. c, plexus choroideus. 



3. Siplionops annulaius (Mus. Berolin.), from above; a, sagittal section, the 



posterior part of the hemisphere cut off obliquely; b, hemispheres spread 

 apart, displaying thalamencephalon and mesencephalon; c, prosenceph- 

 alon, left ventricle exposed; d, thalamencephalon with epiphysis, from 

 above; e, mesencephalon, epencephalon, and fourth ventricle;/, fourth 

 ventricle on removal of cerebellum. Lettering: pr, prosencephalon; me, 

 mesencephalon ; te, thalamencephalon ; ee, epencephalon ; hy, hypophysis; 

 ep, epiphysis; iv, fourth ventricle. 



4. Bufo viridis, from above, left ventricle exposed; a, sagittal section; p. c, 



plexus choroideus. 



5. Epidalea calamita, with plexus choroideus. 



6. Alytes obstetricans. 



7. Pelobates fuacus. 



8. Pleurodema bibroyit. 



9. Leptodactylus caliginosus. 



10. Phrynomantts bifasciatus. 



11. Breviceps mossambicus. 



12. Bhinoderma danvinii. 



13. Atelopus varius; a, roof of mesencephalon removed, showing floor ; b, pros- 



encephalon, left ventricle exposed. 



14. Diplopelma ornatum. 



15. Hylambates maculatus. 



16. Rana erythraea. 



17. Eana esculenta, from above, with plexus choroideus removed (p. c); a, right 



hemisphere removed, left ventricle exposed, and mesencephalon exposed ;^ 

 b, left ventricle. 



18. Xenopus capensis; a, right ventricle and thalamencephalon exposed; p. c, 



choroid plexus and artery. 



