. Bulletin. Natural history. 116 PEABODY MUSEUM BULLETIN 23. Text-fig. 68. Pelvis of Clidastes showing supporting musculature. Abbreviations for text-figs. 68-70: A, M. ambiens; AF, M. adductor femoris; CFB, M. caudifemoralis brevis; CFL, M. caudifemoralis longus; FET, M. femorotibialis; FTE. M. flexor tibialis extemus; FTL M. flexor tibialis internus; IF, M. iliofemoralis; IFL, M. iliofibularis; IIL, ilioischiadic ligament; ILG, iliopubic ligament; IS, M. ischiocaudalis; IT, M. iliotibialis; ITR, M. ischiotrocanteri- cus; PFE, M. puboischiofemoralis externus; PFI, M. puboischiofemoralis inter
. Bulletin. Natural history. 116 PEABODY MUSEUM BULLETIN 23. Text-fig. 68. Pelvis of Clidastes showing supporting musculature. Abbreviations for text-figs. 68-70: A, M. ambiens; AF, M. adductor femoris; CFB, M. caudifemoralis brevis; CFL, M. caudifemoralis longus; FET, M. femorotibialis; FTE. M. flexor tibialis extemus; FTL M. flexor tibialis internus; IF, M. iliofemoralis; IFL, M. iliofibularis; IIL, ilioischiadic ligament; ILG, iliopubic ligament; IS, M. ischiocaudalis; IT, M. iliotibialis; ITR, M. ischiotrocanteri- cus; PFE, M. puboischiofemoralis externus; PFI, M. puboischiofemoralis internus; PIL, puboischiadic ligament; PIT, M. puboischiotibialis; PP, M. pronator profundus; PT, M. pubotibialis; RA, M. rectus abdominus; SE, Mm. supracostalis et intercostalis ischiadic tubercle, and M. iliocaudalis, arising on the ventral surface of the transverse processes and inserting on the posterior edge of the ilium deep to the ilioischiadic ligament. In size and shape the hind limb is very similar to the anterior one. Joints between the propodial (femur), epipodial (tibia-fibula), tarsal and podial ele- ments have similarly lost their mobility. The joint remaining between the limb and the limb girdle is different from that found in the forelimb. The acetabulum is a bowl-shaped structure which opens laterally and a little posteriorly to receive the convexity capping the proximal end of the femur. The hind limb was held in a horizontal plane at more nearly a right angle to the long axis of the body than the forelimb. This probably brought the hind paddle into con- tact with water undisturbed by the passage of the anterior portion of the body and thereby enabled it to exert greater control over the equilibrium of the body. It is quite evident from a dissection of the hind limb that the femur of Varanus could be powerfully rotated about its long axis. Muscles linking the femur with the pelvis wrap partially around the proximal half of the femur to insert either fle
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Keywords: ., bookc, bookcentury1900, bookdecade1920, booksubjectnaturalhistory
