,rMX 



olf.cp 



SP.ETH 



UST-4 



actb-^ 



CAL 



Fig. 311. — The skeleton of the frog (Raiia laiiporaria) . A. Skeleton .seen from above. 

 The left half of the shoulder girdle and the left fore and hind legs are remo\'ed, 

 also the membrane bones on the left side of the skull. Cartilagenous parts are 

 dotted. Names of bones that are first formed in cartilage are in GOTHIC capitals, 

 those formed directly in the skin are in ITALIC capitals, a.c.hy, anterior horn 

 of hyoid bone; acth, depression to recei-\'e femur (/c.) ; AST, "astragalus": b.hy, 

 base of hyoid; C, "calean," bone of a spur; CAL, "calcaneum" of the ankle; 



