| OCR Text |
Show 1882.] DR. GADOW ON THE ANATOMY OF PTEROCLES. 319 bankiva and m Penelope superciliosa, whilst in our common Domestic I'owl it is generally present. In the Pigeons it is often absent. ir present, this muscle arises with a long but narrow and fleshy 5? cu?*0 anteri°r plane of the angle between the lower end of tne bbula and the middle third of the tibia; its strong tendon then passes laterally over the joint and is inserted into the proximal margin of the plantar tarso-metatarsal bone, near the external malleolus. When contracted, the muscle bends the tarso-metatarsus slightly dorsad and inwards. M. gastrocnemius.--This large muscle consists in Pterocles of two parts, each of which arises with two distinct heads (fig. 2) :- Fig. 2. Lateral posterior view of the gastrocnemius muscle of right side of Pterocles arenarius. I. Median part. a. Cap. tibiale : from inner and anterior aspect of the head and neck of the tibia, blending with the tendons of the m . fernoro-tibialis. b. Cap. femorale: from hinder aspect of the intercondyloid region, and at the same time from the ligam. femoro-tibiale internum. II. Lateral part. a. With a slender but distinct tendon from the intercondyloid region and from the outer margin of the femur; its belly PROC. ZOOL. Soc-1882, No. XXII. 22 |
