MR. J. C. GALTON ON DASYPUS SEXCINCTUS. 557 



Ilenle says of the same muscle in man :-— " Er ist ein Analogon des M. / tlmari§ dcr 



obercn Extremitat" \ 



The plan tan s in the Hippopotamus appears to have an arrangement similar to that oi 

 its homologue in D^ijpm and the Rabbit; lor, aeeordii ^ to Gratiolet, this muscle 

 terminates in the sole by four dictations, which i'urni li to < icli of the four toes a 

 superficial flexor of the first and second phalanx-. 



The three toes of the Hgrax, an animal Ungulate in its affinities, are supplied in like 

 manner with offset- from the plant «ris\ 



Flexor long us dig itorum. — A large tleshy muscl»\ which arises by two short heads, 

 separated by the origin of the soles from the whole posterior surface of the fibula, the 

 most external head being highest and situated on the smooth \ternal aspect of the head 

 of the bone, just behind the origin of the most posterior of the pcronei. It also takes 

 origin from the interosseus membrane, and from the fibular aspect of the tibia, imme- 

 diately external to the tibialis posticus. 



At the posterior tibio-ta isal articulation it becomes suddenly tendinous, and its broad 

 stout tendon passes immediately anterior to the insertion of the soleus, and close to the 

 tibial face of the calcaneal process, into the sole; when at about the level of the tarso- 

 metatarsal joint, it divides into live tendons of nearly equal size, each of which passes to 

 a digit, the hallux included, those supplying the latter and the little toe being some- 

 what slighter than their fellows. Just before its division into the above branches, the 



tendon broadens, and in it is developed a flat, smooth, oval sesamoid, of less size than 

 the corresponding ossicle in the palmar flexor tendon. 



The following passage occurs in Cuvier's 'Ossemcns Possiles'* : — Dans le Cachicame* 

 il y a sous le tarse une partie ossifiee du tendon des flechisseurs comme au pied de 

 devant; mais je ne l'ai pas observee dans le Tatou geant ni dans les Cabassous 6 et 

 Encouberts " 7 . 



Flexor brevis diqitoriua.— This muscle was absent; but its oilice appeared to be 



assumed, as I have already stated, by the modified plantar is. 



Tibialis posticus. — Arises by two short heads, between which the anterior tibial vessel 

 pass into the front of the leg. The inner of these heads is attached to the upper third 

 of the posterior face of the tibia, while the other takes origin posteriorly from that 

 portiomof the head of the fibula which is anchylosed with the preceding bone. 



The body of the muscle arises from the whole length of the interosseous membrane, 

 and, at the inner malleolus, becomes tendinous; the tendon, passing through a groove 

 in the posterior inferior aspect of this process, enters the sole of the foot, and finally 

 terminates at the posterior part of the strong scaphoid tubercle which projects on the 

 inner ed<*e of the foot. Just before its insertion, the tendon runs through a strong 





1 Muskellehre, p. 289. 



2 Recherches sur 1' Anatomic de I' Hippopotame, Gratiolet, publiees par lea soins du Dr. Edmond Alix 



p. 295. 



Murie and Mivart, " On the Myology of Hyr ax eapemis," Proc. Zool. Soc. April 1865, 

 * Nouvelle edit., Paris, 1823, torn. v. p. 131. * D< fpm nn mmt +m. 



6 Tatou a 12 hand* (Buffon). 7 #• sexeinetus. 



4h2 



