TADPOLES. 



109 



the mouth or the distance between the 

 nostrils ; usually a black tubercle on the 

 upper mandible . . . B. agilis. 



With 



1. 



2. 



3, 



4. 



5. 



6. 



7. 



8. 



9. 

 10. 

 11. 

 12. 

 13. 

 14. 

 15. 

 16. 

 17. 

 18. 

 19. 



regard to size, the tadpoles rank as follows : 



Maximum length 

 on record. 

 Millimetres. 



175 

 120 

 111 



Pelobates fuscus 



„ cultripes 

 Baiui esculenta . 

 Alytes ohstetricans 



,, cisternasli 

 Pelodytes punctatus. 

 Bana agilis . 

 Bomhiiiator igneus 

 Hyla arborea 

 Bana iberica . 



„ gr^ca . 



,, temporaria, 

 Bomhinator pachypus 

 Bufo viridis . 

 Bana latastii 



,, arvalis 

 Discoglossus pidus 

 Bufo vulgaris 



„ calamita 



90 

 69 

 65 

 69 

 60 

 49 

 49 

 48 

 46 

 45 

 44 

 44 

 43 

 33 

 32 

 30 



But if we compare the maximum length of the tad- 

 pole with the maximum length of the adult, we 



obtain the following order 



1. Pelobates fuscus . 



2. Alytes ohstetricans 



3. ,, cisternasli . 



4. Pelobates cultripes 



5. Pelodytes punctatus 



6. Bomhinator igneus 



Maximum 

 length of adult from 

 snout to vent. 

 Millimetres. 



80 

 54 

 40 

 88 

 45 

 50 



