MR. J. C. GALTON ON DASYPUS SEXCINCTUS. 559 



muscle mentioned above — but, just before this passes into its tendinous pulley, part^ 

 company from it, and turns over the inner aspect of the ento-cuneiforni bone, to In* 



inserted into its inner or inferior edge. 



Peroneus longus. — A muscle of considerable length, having but very slight connexion 

 with the fibula. It has two heads of origin, both fleshy :— the smaller, and higher, from 

 the outer edge of the patella, immediately above its ligament; the larger, from the arch- 

 like ridge connecting the anchylosed upper extremities of the tibia and fibula, most of 

 its inner fibres being intimately connected with those of the origiu of the ea tensor com- 

 munis', other fibres, too, arising from a strong fibrous intermuscular septum, which 

 passes to the latter muscle from the anterior ridge of t he fibula. 



Upon reaching, after a straight course, the hamular projection from the outer mal- 

 leolus, the muscle becomes tendinous, the tendon lying posterior in the concavity of tin 

 above process, being included, together with two other tendons, presently to be described, 

 in a kind of synovial sheath, and being, moreover, arched over by strong fascia which 

 passes from the malleolar process to the keel. 



The tendon then dips down in front of a tubercle (the probable representative of the 

 "peroneal tubercle" of human-anatomy language) developed upon the outer side of the 

 anterior extremity of the calcaneum, being at this spot also arched over by strong fascia. 

 It now, parting company from the two tendons mentioned above, passes into the sole of 

 the foot, turning inwards sharply, almost at right angles to its previous course, and 

 running along in the space between the cuboid and scaphoid bones posteriorly, and th< 

 bones in relation with these anteriorly, being covered by strong ligament which bridges 

 over the intevening gap, reaches finally the outer or fibular side of the base of the meta- 

 tarsal bone of the hallux. 



The tendon, moreover, on reaching the sole of the foot, sends a flat offset to the tibial 



side of the base of the metatarsal of the fifth digit. 



Peronei, brevis et tertius. — Since these muscles are, at their upper part, with difficult \ 

 to be differentiated from each other, they had best be included under one description. 



The highest fibres of origin of the compound muscle proceed from the outer face of the 

 external condyle of the femur, and from a strong flat ligamentous band which proceeds 

 to this part of the condyle from the outer edge of the superior half of the patella. A 

 few fibres, too, arise fleshy from the outer edge of the inferior half of the patella, im- 

 mediately below the attachment to it of the above-mentioned band, being overlapped 

 by the highest fibres of origin of the peroneus longus. The bulk of the muscle takes 

 origin from the whole outer aspect of the fibula, and runs down parallel with, and close 

 to, the preceding muscle, and shares with it the same synovial sheath, behind the outer 

 malleolus, lying posterior and external to its tendon. 



The main portion of the muscle does not become tendinous until it reaches the " pero- 

 neal tubercle " of the os calcis. Here its tendon passes under the same fibrous bridge as 

 that which arches over the tendon of the p. longus, and is finally inserted into the outei 

 face of the tubercle developed upon the inferior surface of the metatarsal of the fifth digit. 



Such a termination appears to answer to that of the peroneus brevis. 



Beo-innm" 1 in the muscle, about halfway down, and running for some distance in its 



