378 



ZOOLOGY. 



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

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



Fig. 378. 



Fig. 379. 



Fig. 380. 



Fig. 378.— Hind leg of a larval Salamander. The dotted lines are drawn through 

 the rays to which the diflerent pieces belong. Fe, femnr : T, tibia ; F, fibula ; i, t. 

 c, f tarsal bones ; i, os intennedium ; i, tibiale ; /, fibulare ; c, ceutrale ; 1-5, the 

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

 carpals). 



Fig. 379.— Bones of the foot of a Reptile Qizard) A, and an embryo bird, B. f, fe- 

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

 1-V, metatarsalla of the toes. 



Fig. 380.— Leg of the Buzzard (Buteo mUgaris). a, femur; b, tibia; y, flbtila: c, 

 tarso-metatarsuB ; «', the same piece isolated, and seen from in front ; M', d", a'", 

 the four digits or toes. — After Gegenbaur. 



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

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



