The alligator and its allies

by A. M. Reese

Fig. 3. A. Mississippiensis. The Deepest Muscles on the Plantar Surface of the Left Hind Foot. Roman Numerals IX-XII, Short Toe Muscles.

Fig. 4. A. Mississippiensis. Left Leg from the Postero-mesial Aspect. The Plantar Flexor Musculature in Situ, after Removal of the Gastrocnemius Muscle and the Associated Muscles. Roman Numerals, VI-X, Short Toe Muscles.

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 V. (From Bronn, after Gadow.)

Fig. 1. Hatteria Punctata. (Ventral View.)

Fig. 2. Alligator Mississippiensis. Left Posterior Extremity; Foot in Pronation, hence Seen from the Dorsal Side. lg, t, f, Ligamentum Tibio-Fibulare.

Fig. 3. A. Mississippiensis. Muscles of the Dorsal Surface of the Lower Leg and Foot.

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.