Vol. 12, No. 9, pp. 363-474, 20 figs. October 25, 1963 Variation in the Muscles and Nerves of the Leg in Two Genera of Grouse (Tympanuchus and Pedioecetes) BY E. BRUCE HOLMES UNIVERSITY OF KANSAS LAWRENCE 1963 UNIVERSITY OF KANSAS PUBLICATIONS, MUSEUM OF NATURAL HISTORY Editors: E. Raymond Hall, Chairman, Henry S. Fitch, Theodore H. Eaton, Jr. Volume 12, No. 9, pp. 363-474, 20 figs. Published October 25, 1963 UNIVERSITY OF KANSAS Lawrence, Kansas PRINTED BY JEAN M. NEIBARGER, STATE PRINTER TOPEKA, KANSAS 1963 [Illustration] 29-5835 Variation in the Muscles and Nerves of the Leg in Two Genera of Grouse (Tympanuchus and Pedioecetes) BY E. BRUCE HOLMES CONTENTS PAGE Introduction 367 Materials and Methods 368 Terminology 369 Acknowledgments 375 Skeleton 375 Nerves 376 Lumbosacral Plexus 376 Femoral Nerve 377 Obturator Nerve 379 Sciatic Nerve 379 Peroneal Nerve 382 Tibial Nerve 384