398 



ZOOLOGY. 



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

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



FlQ. 384. 



Fia. 385. 



Fig. 3R3.— Hind leg of a larval Salamander. The dotted lines are drawn through 

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

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

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

 carpals). 



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

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

 2-V, metatarsalia of the toes. 



Fig. 385.— Leg of the Buzzard (Buteo vulgaris), a, femur; 6, tibia; 6', fibula; c, 

 tarso-meiatarsus ; c', the same piece isolated, and seen from iu 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- 



