378 



ZOOLOGY. 



well marked ; of the slits or openings between them, the 

 first is destined to form the mouth, the next pair of slits 



B 



Fig. 378. -Hind lee; of a larval Salamander. The dotted lines are drawn through 

 the ray* to which the different pieces belong. Fe, femur : T, tibia ; f 1 , fibula it 

 c,f, tarsal bones; i, os intermedium; t, tibialc; /, flbulare; c, centrale ; 1-5, the 

 five tarsals. The first row of phalanges are culled metatarsals (in the hand meta- 

 carpals). 



Fig. 3T9.-Bones of the foot of a Reptile (lizard) A, and an embryo bird B. f, fe- 

 mur ; t, tibia: n, fibula; u, upper, ti. lower pieces of the tarsus; m, metatarsus ; 

 J- T . metatarealia of the toes. 



Fig. 380.-I.ei.' of the Buz/ard (Butto vulgaris). a, femur; 6, tibia; b> fibula- c 

 tareo-metatarsna ; c', the same piece isolated, and seen from in front; dd> d" d'" 

 the four digits or toes. After Gegeubaur. 



in the Amphibia and higher Vertebrates forms the ear-pass- 

 age, while the other slits may remain open in fishes, form- 



