EXPLANATION OF PLATES. 



PLATE I. 



Batrachia, natural size. 



Fig. 1. Granoptiis fastidioaus ; la, mouth. 



2. Crepidius epioticus; 2a, mouth. 



3. Ollotis ccerulescens ; 3a, mouth, 



4. Bufo auritus. 



5. Bufo coccifer. 



6. Dendrohates talamancse, 

 *l. Hyla nigripes. 



8. Phyllohales hylseformis ; 8a, mouth. 



9. Lithodytes podiciferus. 



10. Lithodytes melanostictus ; 10a, mouth. 



11. Lithodytes megacephalus ; 11a, mouth. 



12. Trypheropsis chrysopi-asinus ; 12a, mouth. 



PLATE IL 



Fig. 1. Anolis insignis. 



2. " microtus. 



3. " ' pachypus. 



4. " oxylophus. 



5. Ghalcidolepis metallicus. 



PLATE in. 



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

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



PLATE IV. 



Fig. 1. Dendrophidium vielanotropis. 



2. Dryophis hrevirostris. 



3. Hyla elseochroa ; 3a, mouth. 



4. Hylodes cerasinus ; 3a, mouth. 



PLATE Y. 



Fig. 1. Leptognathus argus; natural size. 



2. Teleuraspis schlegelii ; natural size. 



3. Bothriopsis prohoscideus ; natural size. 



4. Hyla uranochroa ; natural size. 



PLATE YI. 



Heads of Lacertilia and Ophidia, natural size. 

 Fig. 1. Mabuia alliacea, from above. 



2. Ghalcidolepis 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 h. 

 1. Leptognathus argus (a). 



8. Leptognathus pictiventris {a and 5\ 



9. Leptophis seriiginosus (a and 6). 



10. Leptophis saturatus {a and 6). 



11. Spilotes chrysobronchus (a and b). 



12. Contia calligaster (a and b). 



13. Bothriopsis proboscideus (a). 



