PAGE FIG. 1. Pelvis of _Tympanuchus pallidicinctus_. A. Lateral view. × 1. B. Ventral view. × 1-1/8. 370 FIG. 2. Ventral views of the lumbosacral plexus of _Tympanuchus pallidicinctus_. Sympathetic ganglionated chain removed. Numbers indicate synsacral spinal nerves. × 2. A. T.p. 1L. B. T.p. 2L. 386 FIG. 3. Ventral views of the lumbosacral plexus. Sympathetic ganglionated chain removed. Numbers indicate synsacral spinal nerves. × 2. A. _Tympanuchus cupido pinnatus_ 3L. B. _Pedioecetes phasianellus jamesi_ 4L. 387 FIG. 4. Semidiagrammatic ventral views of the femoral nerve, showing the distribution of the branches. × 3. 1,2, M. extensor iliotibialis anticus; 3, cutaneous; 4-6, M. extensor iliotibialis lateralis; 7,8, M. iliacus; 9, M. gluteus profundus; 10-12, fused Mm. vastus lateralis and vastus medialis; 13,14, M. vastus medialis; 15, M. ambiens; 16, M. femoritibialis internus; 17, nonmuscular; 18, M. psoas; 19, M. iliotrochantericus medius. A. _Tympanuchus cupido pinnatus_ 3L. B. _Pedioecetes phasianellus jamesi_ 3L. 388 FIG. 5. Semidiagrammatic ventral views of the femoral nerve, showing the distribution of the branches. × 3. 1,2, M. extensor iliotibialis anticus; 3, cutaneous; 5,6, M. extensor iliotibialis lateralis; 7,8, M. iliacus; 9, M. gluteus profundus; 10,11, fused Mm. vastus lateralis and vastus medialis; 13, M. vastus medialis; 15, M. ambiens; 16, M. femoritibialis internus; 17, nonmuscular; 18, M. psoas; 19, M. iliotrochantericus medius. A. _Tympanuchus pallidicinctus_ 2L. B. _Tympanuchus cupido attwateri_ 1R. 389 FIG. 6. Semidiagrammatic dorsolateral view of the sciatic nerve of _Pedioecetes phasianellus jamesi_ 3R, showing the distribution of the branches. × 2-1/2. 1, M. gluteus profundus; 2, M. piriformis; 3, M. extensor iliotibialis lateralis; 4-7, M. extensor iliofibularis; 8, M. flexor cruris medialis; 9, cutaneous; 10, to pudendal plexus; 11, M. flexor cruris lateralis; 12, M. caudofemoralis pars caudifemoralis; 13-15, M. caudofemoralis pars iliofemoralis; 16,17, M. flexor ischiofemoralis; 18,19, M. femorocruralis (branch of tibial nerve); 20, cutaneous; 21, M. gastrocnemius pars media (branch of tibial nerve); 22, cutaneous. 390