138 



is in comparison to the Jlexor suUimis a very povverful musele. The 

 latter teiminates only in two tendons, vvhich are inserted into the 

 first and second phalanges of the mdex and digitus medius, forming 

 strong sheaths for the passage of the tendons of the profundus. This 

 musele arises by three distinct poitions j one from the vvhole anterior 

 part of the olecranon ; a second from the anterior part of the ręst of 

 the ulna, and from the interosseous ligament ; the third portion ap- 

 pears to hold the place oi Jlezor langus pollicis, and comes from the 

 anterior part of the radius. The vvhole is inserted into the spade- 

 shaped bone, beyond \vhich tendons are continued to the extreme 

 phalanges of all the fingers. 



"The greater length of the i??dex finger depends on that of the 

 first phalanx, which in all the other fingers is very short, and in the 

 two external is a mere lamina of bone. This is a peculiarity found 

 in most of the Edentata ; so that in the Sloths, where the first 

 phalanx is early anchylosed to the metacarpal bones, its existence 

 was overlooked before the observations of Cuvier. The distai pha- 

 langes of the second and third fingers are the largest ; at the lower 

 part of them is the rudiment of the bony sheath supporting the clavvs. 

 Besides the lever afl'orded by the palmar spade-shaped bone, there is 

 a distinct sesamoid interposed betvveen the lašt joints of each finger 

 and the Jlexor tendon. The length of the vvhole hand is 2 inches 4 

 lines ; its breadth 10 lines. 



"There is scarcely any cervix to the f emur, but immediately be- 

 yond the head are the tvvo trochanters, and a large middle process, 

 analogons to the deltoid in the humerus. The length of the femur is 

 2 inches 6 lines. The patella is oblong and narrovv. The tibia and 

 fibula are anchylosed at both extremities : the length of the libia is 

 2 inclies ; the breadth of the interosseous space nearly 5 lines. 

 The bones of the torsus presented the šame disposition as is de- 

 scribed by Cuvier, and figured in PI. xi. fig. 18. of the work above 

 quoted. The small supernumerary bone on the tibial side of the 

 tarsus has the tendon of a small musele inserted into it, vvhich seems 

 to be afasciailus separated from the tibialis posticus ; the ręst of the 

 tibialis posticus is inserted as usual into the base of the internal cu- 

 neiform bone. 



" The^e^or longus digitorum pedis and the Jlexor longus pollicis 

 pedis are united through nearly their whole extent. The common 

 tendon, having reached the sole, expands and surrounds a sesamoid 

 bone, smaller than, bnt analogous to, the spade-shaped sesamoid in 

 the palm. Cuvier statės thjit he had not observed this plantar sesa- 

 moid in Any Armadillo except the Cachicame, Das. Peba. The length 

 of the vvhole foot is 2 inches 8 lines j its breadth 1 inch." 



