. The anatomy of the frog. Frogs -- Anatomy; Amphibians -- Anatomy. MUSCLES OE THE HIND LIMB. 103 Fi^. 86. internally in a concave aponeurotic arch : the second head is a thin, tendinous slip, "arising* from the common tendon of the triceps as this lies on the knee-joint. The muscle is thickest near its origin, and then gradually diminishes in size as it passes backwards ; the superficial sm^face is convex, the deep surface is flat. By tracing the tendons of orig-in, they are seen soon to unite and form a common flat tendinoiis surface, broad in front, contracted behind ; this aponeurosis
. The anatomy of the frog. Frogs -- Anatomy; Amphibians -- Anatomy. MUSCLES OE THE HIND LIMB. 103 Fi^. 86. internally in a concave aponeurotic arch : the second head is a thin, tendinous slip, "arising* from the common tendon of the triceps as this lies on the knee-joint. The muscle is thickest near its origin, and then gradually diminishes in size as it passes backwards ; the superficial sm^face is convex, the deep surface is flat. By tracing the tendons of orig-in, they are seen soon to unite and form a common flat tendinoiis surface, broad in front, contracted behind ; this aponeurosis lies in a plane running obliquely from the deep surface towards the superficial surface, without, how- ever, reaching" this. The muscular fibres arise from both surfaces of the aponeurosis, the fibres of the two sides diverging slightly as they pass backwards so as to be inclined at a small ang'le to each other. The fibres are inserted into a fibrous ex- pansion [Ajj) which lies on the su- perficial surface of the muscle; thin and slight in front, this aponeurosis rapidly thickens posteriorly until it passes into the tendo Achi/li-s. 128. M. tlhlalis posticus (Fig-. 86 ). Dugès, cruro-astragalien, n. i6o. Covered by the gastrocnemius this Muscles of the right leg and foot of Rana escuknia. a Dorsal view. M. abductor hallucis. M. abductor longus digit! I. F. Ajxjneurosis plantaris. : b M. biceps. M. extensor tarsi. M. flexor digitoriim III, IV, V longus. '. M. flexor digitorum I and II longus. <J M. gastrocnemius, drawn towards the riglit. .'/' Tendon of origin of gastrocnemius. Ligamentum calcanei. P M. plantaris. MM. internus maior and minor. . M. semimembranosus. M. semitendinosus. Tendo AchilUs. '. Thickening of tendo Achilhs. M. tibialis posticus. M. vastus externus. M. vastus Please note that these images are extracted from scanned page images that may have been digitally enhanced for re
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