DESCRIPTION OF PLATES. 517 



PLATE III. REPTILES. 



Fig. 1. Testudo Graeca. 



2. Head of the Rattlesnake. 



3. Ventral and transverse plates of a Boa. 



4. Poison Fang of the Rattlesnake. 



5. Head of the Caecilia, or Naked Serpent. 



6. Head of a Coluber, exhibiting the arrangement of the plates. 



7. Head of a Serpent with the head covered with scales. 



8. Head of the Siren, exhibiting the external branchiae. 



9. Foot of the Iguana vulgaris. 



10. Foot of a Lizard. 



11. Foot of a Gecko. 



12. Foot of a Frog. 



13. Under part of the tail of a Boa, showing the arrangement 



of the plates. 



14. Under part of the tail of a Coluber. 



15. Anolius principals, exhibiting the gular pouch. P. 349, 



line 10. Instead of five rays read fifteen. 



16. Anguis fragilis, or Blind Worm. 



17. Vipera Berus, or Common Viper. 



18. Rana esculenta, or the Green Frog. 



19. Spawn of the Green Frog. 



20. Bufo calamita, or the Mephitic Toad. 



PLATE IV. FISHES. 



Fig. 1. Gymnotus electricus, or the Electric Gymnotus. 



2. Head of the Carcharias vulgaris, or White Shark. 



3. Diodon atinga. 



4. Syngnathus typhle. 



5. Salmo salar. The Salmon. 



6. Morrhua vulgaris. The Cod-fish. 



7. Platessa vulgaris. The Plaise. 



8. Conger vulgaris. The Conger Eel. 



9. Mullus surmuletus. The Surmullet. 



10. Aspidophorus cataphractus. The Armed Bullhead. 



11. Scomber scomber. The Mackerel. 



12. Zeus faber. The Dory. 



13. Chetodon setifer. 



14. Centriscus scolopax. 



15. Xiphias gladius. The Sword-fish. 



