18/6.] MR. F. J. BELL ON MOSCHUS MOSCHIIEUUS. 187 



Pig is, that it terminates on the proximal end of the metatarsal, in- 

 stead of on the second cuneiform. 



The extenscr metatarsi anterior, and the extensor digitorum com- 

 munis are barely se[)arable in the muscular portions, as in the Sheep, 

 Deer, Hyomoschvs, and the Pia;. The external extensor crosses over 

 the tarsus, in close company with the proper extensors of the fourth 

 and fifth digits; in the Sheep, as might be supposed, and in C. vir- 

 ginianus, the proper extensor of the fifth is absent. Save in this 

 particular, there is no variation in the arrangement of this external 

 extensor in Ruminants from that which obtains in the Pig. 



/3. Posterior face of the metatarsus ; no muscles are in- 

 serted into it. 



C. Muscles of the digits. 

 «. Anterior face. 



( 1 ) Extensor digiti qiiiuti. 



(2) „ „ quarti. 



(3) „ digitorum communis. 



(4) „ digiti tertii. 



(1) The tendon of this muscle is in close proximity to that of the 

 extensor dig. quarti, till it approaches the phalangeal or distal end of 

 the metatarsus, where it widens, separates from it, and is inserted into 

 the third phalanx of the fifth digit. It is absent in C. virginianus, 

 as in the Sheep. 



(2) This muscle terminates by a broadened strong tendon, on the 

 second phalanx of the fourth digit, as in the Sheep, Cervus, Hyo- 

 moschus, and the V\z. 



(3) The common extensor has only two branches, which end in the 

 third phalanges of the median digits, as in Cervus virginianus ; but 



the same muscle has four branches in Hyomoschus, as in the Pig 



though only two in Tragulus, as in the manus. 



(4) In close connexion with the common extensor arises the ex- 

 tensor of the internal digit, which terminates in the second phalanx 

 of the third, and the third phalanx of the second digit. No branch 

 for the second digit was found in C. virginianus ; but the lateral di- 

 gits of the pes have no metatarsal bones at all, although there are 

 small metacarpals in the manus. 



Chatin notes no internal flexor in Hyomoschus, which is strange, 

 as the muscle is found in the Pig and in Tragulus, as well as in the 

 Sheep and Cervus. 



/3. Posterior face, 



(1) Perforatus. 



(2) Perforans. 



(3) Flexor obliquus. 



The |}e?/ora/;t<s muscle has been already spoken of; it only now 



remams to be added that it has only two branches, as in the manus. 



Ihc perforans, again, has but two tendons, and those for the median 



