Fig. 30. — Metamorphosis of Fana temporaria. 1, tadpole just hatched ; 2, 3, successively 

 older tadpoles seen from one side; 4, a slightly older tadpole seen from the aorsal side; 5, 

 a still older specimen from below; 6, tadpole with the gills covered, leaving only. a small 

 opening on the left side; 7, first indication of hind legs; 8 and 10, successively older stages; 

 g, specimen with the ventral bodv wall removed, showing the coiled intestine and gills; 11, 

 both pairs of legs free ; 12, 13, 14, successive stages in the resorption of the tail; 15, adult 

 frog. A, anus; HE, hind leg; A", gills; KL, gill opening; M, mouth; N, nasal opening; 

 O, eye; SiY, ventral sucker. (From Weysse's "Synoptic Text Book of Zoology," after 

 Leuckart and Nitsche.) 



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