EXPLANATION OF PLATES. 



PLATE I. 



Batrachia, natural size. 



Fig. 1. Cranopsis fastidiosus ; la, mouth. 



2. Crepidius epioticus; 2a, mouth. 



3. Ollotis ccerulescens ; 3a, mouth. 



4. Bufo auritus. 



5. Bufo coccifer. 



6. Dendrobates talamancse. 



7. Hyla nigripes. 



8. Phyllobates hylseformis ; 8a, mouth. 



9. Lithodytes podiciferus. 



10. Lithodytes melanostictus ; 10a, mouth. 



11. Lithodytes megacephalus ; 11a, mouth. 



12. Trypheropsis chrysoprasinus ; 12a, mouth. 



PLATE II. 



Fig. 1. Anolis insignis. 



2. " microtus. 



3. " pachypus. 



4. " oxylophus. 



5. Chalcidolep>is metallicus. 



PLATE III. 



Fig. 1. Basiliscus plumifrons, natural size; la, head from above. 

 2. Basiliscus mitratus; heart from above, natural size. 



PLATE IV. 



Fig. 1. Dendrophidium melanotropis. 



2. DryopJiis brevirostris. 



3. Hyla elssoch?-oa; 3a, mouth. 



4. Eylodes cerasinus; 3a, mouth. 



PLATE V. 



Fig. 1. Leptnqnathus argus ; natural size. 



2. Telearaspis schlegelii; natural size. 



3. Bothi-iopsis proboscideus ; natural size. 



4. Hyla uranochroa ; natural size. 



PLATE VI. 



Heads of Lacertilia and Ophidia, natural size. 

 Fig. 1. Mabuia alliacea, from above. 



2. Chalcidolepis metallicus ; a, above ; 6, below. 



3. Amiva gabbiana; a, above ; 6, below. 



4. Anolis trochilus, above. 



5. Anolis oxylophus, above. 



6. Xiphosoma annulatum: in this and the following figures, the superior view is marked a, 



the lateral b. 



7. Leptognathus argus (a). 



8. Leptognathus pictiventris (a and b). 



9. Leptophis seruginosus (a and b). 



10. Leptophis saturatus (a and b). 



11. Spilotes chrysobronchus (a and 6). 



12. Contia calligaster (a and 6). 



13. Bothriopsis proboscideus (a). 



Pcblished Nov. 26, 1875. 



