.398 



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. 383. Hind leg of a larval Salamander. The dotted lines are drawn through 

 the fays to which the different pieces belong. Fe, femur : T, tibia ; F, fibula ; i, t, 

 c, f, tarsal bones ; i, OB intermedium ; I, tibiale ; /, fibulare ; c, centrale ; 1-5, the 

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

 carpala). 



Fig. 384. Bones of the foot of a Reptile (lizard) A, and an embryo bird, B. /, fe- 

 mur ; <, tibia ; n, fibula ; te, upper, ti, lower pieces of the tarsus ; m, metatarsus ; 

 1- V, metatarsalia of the toes. 



Fig. 385. Leg of the Buzzard (Butep vulgaris). a, femur ; b, tibia ; b>< fibula ; c, 

 tarso-metatarsus ; c', the same piece isolated, and seen from in front ; dd', d", d"' 

 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- 



