﻿MURIE ON THE THREE-BANDED ARMADILLO 



113 



Extensores carpi radiaKs longior et brevior are met with in distinctness. The 

 former fair-sized, lias origin below the supinator, and between it and the external con- 



dyle 



As its distal tendon, at first broadish, narrows inferiorly, it passes over the end of 



the radius, and is inserted upon the protuberant internal knuckle and top of the trapezio- 

 trapezoid bone. The latter, second muscle is more compressed, and starts by tendon from 

 the external condyle, but ends by a fleshy insertion on the outer edge of the radius 

 to about the middle of the bone. 



With 



of belly, the carpo-radial extensor 



the six-banded Armadillo is provided with two terminal tendons, one to the indicia! 

 metacarpal, the other to the third metacarpal \ In Chlamydopliorus an indicial ten- 

 dinous insertion is alone mentioned. 



The extensor communis digitorum is derived equally from the external condyle and the 

 intermuscular fascia. It divides into a pair of tendons above the wrist-joint. The 

 broader and much the stronger one supplies the enlarged middle digit, the lesser goes 

 to the fourth or outer digit, both being partially fastened to the powerful rigid claws as 

 well as the bone. Hyrtl, in CMamijdophorus, and Meckel and Galton, in Dasijpus, state 

 that the 2nd, 3rd, and 4th digits receive tendons, the latter authority figuring ' two 

 oblique phalangeal intercommunications ; whilst Huxley alludes to a tendinous expansion 



L the back of the manus. 



There is a smaller muscle arising from the external condyle outside the 



common 



extensor. It passes separately to the outer groove on the back of the distal cxf romity 



of the ulna, previously splitting into two 



qual-sizpd tendons 



The srrallcr ond 



shorter 



g 



to the outside of the fourth digit 



The larger inner one has a 



double 



insertion, viz. broadly into the top of the root of the fourth toe, and by 



tendon on the outside of the great clawed third 



Besides attachment to 



( 



car])0 



metacarpal fascia, the latter is in connexion with an inner recurront tci.lon fixed to tli 



communis 



No slip was sent 



the third diffit in the opposite left Hi 



above evidently represents an extensor minimi, and in part an e. mcdius digiti 

 the foregoing, an extensor indicis is present 



Besides 

 This has an ulnar and interosseo-mcmbranal 



^nd it'sends a flat tendon on to the terminal phalanx of the inner second di 



Ther 



is, moreover, an 



extensor ossis metacarpi, but 



extensor primi and sccundi 



of these three comes from the upper outer surface of the 



internodi. The form 



below the olecranon, and partly from the interosseous 



ulna 



membrane 



It winds round the 



radius, arching over the long radio-carpal extensor, and is inserted into the trapezium 



In the 6-banded Armadillo, Galton 



3 



efully registers and fi 



minimi 



digiti, with a single tendon to'the metacarpal and proximal phalanx of the outer di 



to proxmial phalanx of 4th nnd 



ungual 



an ex. annularis, with tendon bifurcating , _ i „ .„,.,il... 4.. 



phalanx of 5th digit; an ex. indicis, with a large tendon to the mdex and a snuDu^^to 



the poUux; an 

 carpal. 



tendon to the 



m. pollicis, terminatmg 



Compared with these observations, a slight 



the radial side of the pollicial mcta 



absence of pollicial 



iation 



Jh 



i icis r; o7 r : .: pomcis' is .hat Mc^el -avers of the Tatu 



* Galton as cited. 



• L. e. pp. 542, 543, and figs. 1 and 2 



• Z. e. fig. 5, pi. 44 



4 



Anat. Comp. (Frencb ed.) vol. vi. p, 320 



VOL. XXX. 



Q 



