﻿100 



DR. J. MURIE ON THE THREE-BANDED ARMADILLO. 



The extensor longus digitorum is equal in bulk to tlie tibialis antieus. Its origin is 

 from between the heads of the tibia and fibula, and from the anterior edge of the shaft 

 _. .!.,•„ !„++.. r.nnp for half its len-th. The muscular belly divides into three nearW 



of this latter bone for half its length 



nearly 



qual-sized tendons above the maUeolus, whereof the outermost of these divisions bifur 

 cates and sends sHps to the foui'th and fifth digits, the fourth being the longest of the 

 two. The middle tendon goes singly and broadly to the fourth digit. The innermost 

 tendon divides in the middle of the dorsum, and sends two broad and flat slips to the 



second and third digits. 

 This muscle m the Encoubert, according to Iluxley \ divides but into a pair of main 



tendons, the fibular division as above, the tibial splitting and supplying 2nd, 3rd, and 



toes 



In Galton's^ dissection a treble division existed. The middle tendon 



joined by the outer slips of the extensor brevis, then parted into two, terminating in 4th 

 and 3rd digits ; the inner tibial tendon was joined by the median short extensor muscle, 

 subdivided into two, but ended with tripartite tendon on the back of the 3rd and 2nd toes. 

 Moreover there was a fibrous junction of the latter with the tendon of the extensor 

 proprius haUucis. Divided into four tendons, going to as many outer digits in the 



^^ F 



ChlamydopJiorus. 

 The extensor brevis digitorum is composed of a few fleshy fibres, which come fi:oni 



the outer malleolus, the external lateral ligament, and the anterior upper edge of the os 



calcis. The fibres divide into two separate slips, ending in thin tendons, which join 



beneath those of the long extensor, going to the 2nd and 4th digits. Trom the slip 



joining the 2nd digit a very minute secondary slip of muscle, ending in a still finer 



tendon, could be traced coming from it, and, mingling, was lost in the long tendon of the 



3rd digit. I observed a small sesamoid bone in the latter tendon at the joint. Huxley's 



and Galton's observations and Cuvier*s illustration (fig. 2 1) of D. 6-cinctus nearly coin. 



cide, the fleshy e. b. d. being somewhat trifid, and joining the tendons of the long ex- 



tensor as above mentioned. Hyrtl alludes to quadruple tendons in C. trtmcatm and the 

 Dasypodes. 



Peronei.— Comparatively weak in muscular fibre ; the p. lon^s has origin from the 

 fibula, the anterior surface of its head and upper fourth of the shaft of the fibula. Its 

 tendon commences at the middle of the leg, glides under the outer malleolus, and pro- 

 ceeds deeply across the foot to the proximal ends of the 2nd and 1st metatarsals \ The 

 p. brevis is much larger than the preceding both in belly and tendon. It springs from 

 the upper half of the outer and slightly backward aspect of the fibula, the strong external 

 ligament separating it and the peroneus longus above. It has superficial tendinous 

 hbres in nearly the whole of its belly ; but the real tendon commences about the upper 

 end of the lower thhd of the fibula, passes in company with the tendon of the p. longus 

 m the groove below the outer malleolus, and is inserted into the outer side of the distal 

 tna ot Uie fourth metacarpal bone. Besides the foregoing, I made out bv careful mani- 



I 



\ 



* Qdton makes mention of 

 pJwtar tendon finally ending 



> 



' L. c. p. 560, pi. 44. fig. 5. 



ar origin in 2). Q-dnctus, and foUows in detail the relations of tbe 



