PLATE III. 



FIG. i. MUSCLES OF THE POSTERIOR EXTREMITY OF ALLIGATOR 

 MISSISSIPPIENSIS. LEFT SIDE, VENTRAL (PLANTAR) SURFACE. 



FIG. 2. THE SAME, DORSAL AND LATERAL SURFACES. 



FIG. 3. A. MISSISSIPPIENSIS; THE TENDONS OF THE FLEXOR TIBI- 



ALIS MUSCLE IN THEIR RELATION TO THE GASTROCNEMIUS 



MUSCLE. RIGHT LEG, INNER SURFACE. (Fics. 1-3 



from Bronn, after Gadow.) 



amb, ambiens; cap, exl, gaslr, external head of gastrocnemius; cap, int, gastr, in- 

 ternal head of gastrocnemius; cd, fm, caudali-femoralis; cd, il, fern, caudi-ilio- 

 femoralis; ex, il, tb, extensor ilio-tibialis; cxt, I (long), dig, extensor longus 

 digitorum; fl, tb, exl, flexor tibialis externus; fl, tb, int, flexor tibialis internus; 

 fm, tb, femoro-tibialis; il, cd, ilio-caudalis; il, cost, ilio-costalis; il, fib, ilio- 

 fibularis; il, fm (il, f), ilio-femoralis; il, s, cd, ilio-sacro-caudalis; is, cd, ischio- 

 caudalis; is,f, ischio-femoralis; ob, exl, obliquus externus; pb, cd, pubi-caudalis; 

 pb, is, tb, pubi-ischio-tibialis; pb, tb, pubi-tibialis; peron, ant, peroneus an- 

 terior; peron, post, peroneus posterior; p, is, f, exl. pubi-ischio-femoralis 

 externus; p, is, f, int, pubi-ischio-femoralis internus; p, is, f, post, pubi- 

 ischio-femoralis posterior; qudr, Ib, quadratus lumborum; reel, rectus abdo- 

 ininis; lib, ant, tibialis anticus; lib, post, tibialis posticus; trans, transversus 

 abdominis; tr, per, transversus perinei; m, post, il, posterior border of ilium; 

 oft, foramen in pubis for the obturator nerve; o, il, ilium; o, is, ischium; 

 o, pb, pubis; o, cl, cloacal bone; pr, I, pb, lateral process of pubis; pr, tr, tians- 

 verse process; sp, ant, il, anterior spine of ilium; Sy, p, symphysis pubis; 

 Sy, is, symphysis of ischium; tb, is, tubercle of ischium. 



