The alligator and its allies

by A. M. Reese

Plate III.

Fig. 1. 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 Tibialis Muscle in their Relation to the Gastrocnemius Muscle. Right Leg, Inner Surface. (Figs. 1-3 from Bronn, after Gadow.)

amb, ambiens; cap, ext, gastr, external head of gastrocnemius; cap, int, gastr, internal head of gastrocnemius; cd, fm, caudali-femoralis; cd, il, fem, caudi-ilio-femoralis; ex. il. tb. extensor ilio-tibialis; ext, l (long), dig, extensor longus digitorum; fl, tb, ext, 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, ext, obliquus externus; pb, cd, pubi-caudalis; pb, is, tb, pubi-ischio-tibialis; pb, tb, pubi-tibialis; peron, ant, peroneus anterior; peron, post, peroneus posterior; p, is, f, ext, pubi-ischio-femoralis externus; p, is, f, int, pubi-ischio-femoralis internus; p, is, f, post, pubi-ischio-femoralis posterior; qudr, lb, quadratus lumborum; rect, rectus abdominis; tib, ant, tibialis anticus; tib, post, tibialis posticus; trans, transversus abdominis; tr, per, transversus perinei; m, post, il, posterior border of ilium; ob, foramen in pubis for the obturator nerve; o, il, ilium; o, is, ischium; o, pb, pubis; o, cl, cloacal bone; pr, l, pb, lateral process of pubis; pr, tr, transverse process; sp, ant, il, anterior spine of ilium; Sy, p, symphysis pubis; Sy, is, symphysis of ischium; tb, is, tubercle of ischium.

Plate IV. (From Bronn, after Gadow.)

Fig. 1. Alligator Mississippiensis. Inner Surface of the Pelvic Region, Left Side. The Pubis, Ischium, and Vertebræ are Cut through the Median Plane, XXVIII, 28th Vertebra.

Fig. 2. Hatteria Punctata.