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



ligamentous sling or pulley, which passes from the anterior part of the free internal 

 edge of the maUeolus to the scaphoid bone, immediately posterior to the tubercle men- 

 tioned above. 



Taking origin from the middle third of the posterior aspect of the tibia, immediately 

 below the inner head of the tibialis posticus, and lying between the origin of its body 

 and the popliteus at its insertion, is a smaller muscle, which, at the inner malleolus 

 becomes tendinous, the tendon lying in the malleolar groove in company with, and to 

 the tibial side of, that of the tibialis posticus. 



The tendon, after its emergence from the groove, passes on to the internal slope of 

 the dorsum of the foot, and, running oyer the scaphoidal tubercle, is inserted into the 

 posterior part of an ossicle which lies immediately in front of this tubercle, alongside of 

 the free edge of the ento-cuneiform bone. Prom the anterior portion of the said ossicle 

 passes a strong tendon or ligament, to be inserted into the tibial side of the base of the 

 proximal phalanx of the hallux. 



May not the latter of the two muscles described above be regarded as a tibialis posti- 

 cus secundns vel interims 1 ? .■■.■■•■.'" 



Cuvier figures the last-described differentiated slip as the tibialis posticus, while this 



latter is represented by him as the flexor longns pollicis* 



Meckel describes a division of the tibialis posticus into two parts as taking place in 

 ^ I T* and Marm0t ' but does ™* ««*d the occurrence of a like differentiation in 



the Bruta 



f 



x 



Tibia lis 



Z 1 r 6 ^^Tf' m ** "™°graph upon the Platypus', records the existence , 

 sesammd ossxele m the tendon of the tibialis posticus of this Monotreme. 



sidtrabTe 2 , T ^ tend ° n ° f ^ mUSCle C ™ ta ™' fa A P<*' " —™id of con- 



t nee o 7 "I • 1 ^ SCaph ° id5 - Church ' h ™ r > ^os not record the exis- 



_ . y Such osslcle lu the Apes he examined . 



face nf «„> km r A T^ ° f *"* ^ Which arises from the U PP<* t hird of the inner 

 bone i It 2 ?2jl 0m f the ^ 0lW arCh f ° rmed * the **» of "be upper part of this 

 for as fte 01 tf nf !; " ^ """ ^ ° f the a » te ™ ""ge of the latter bone, as 

 vlstZ one e * t *™J«**» '^lucis, and from the interosseous membrane. 



tJSZ- and H [e Tt m " S Migin at the tibi0 " ta - al articulation, it becomes 

 teuuinous , ana its tendon then runs Hnw + ft *i,„ +-i • i • i « 



«a runs close to the tibial side of, and parallel to that of, the 



• Varieties in Human ^^^»^^^^ ^ * 8U ^ estion thro ™ out by Mr. John Wood in a papt 



on 



Royal 

 .- F <^o ux wmen tms oceurs (p. H of reprint) ^ 



sesamoid bone was likewise found in flu, «™-i~. .* L ... 



the scaphoid bone. 



— " In many of the same feet, 



Armadill 



oecurrence of an additional tarsal bone in this 



over. 



differentiation of fibres of th, t^r 



™. _^ , 8 0t the tlblahs Posticus, similar 



found attached to it in these animals is pro 



Anat 



shown 



the 



Omithorhynchi Paradox! Descript. Anat. rFnl T^ \2L* PP " 636 ' 637 - 



* Lemons, he. tit. p. 541. 



satis magnum 



(Fol. Leipzig, 1826), p. 30 :-« Reliquis longe minor tendine tenui, 



>> 











I 



