378 ZOOLOGY. 
well marked; of the slits or openings between them, the 
first is destined to form the mouth, the next pair of slits 
Fie. 379, Fia. 380. 
Fig, 378.—Hind Jeg of a larval Salamander. The dotted lines are drawn through 
the rays to which the different pieces belong. Fe, femur: 7, tibia; F, fibula; i, ¢, 
c, f, tarsal bones; @, os intermedium; ¢, tibiale; /, fibulare; c, centrale; 1~b, the: 
five ee The first row of phalanges are called metatarsals (in the hand, meta- 
carpals). 
Fig, 379.—Bones of the foot of a Reptile (lizard) A, and an embryo bird, B. J, fe- 
mur; ¢, tibia; 7, fibula; és, upper, 4, lower pieces of the tarsus; m, metatarsus ;. 
LJ, metatarsalia of the toes. 
Fig. 380.—Leg of the Buzzard (Buteo vulgaris), a, femur; ), tibia; b/, fibula; c,, 
tarso-metatarsus ; c’, the same piece isolated, and seen from in front; dd’, a”, qu. 
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- 
’ 
