461 



8. The complete fusion of gluteus inedius and minimus was one 

 of the rarest anomalies which I have met with. The anterior fibres 

 of these muscles, however, are not unfrequently united together 

 inseparably. 



9. The glutaaus medius and pyriformis I have not uncommonly 

 found united at their insertion; more rarely I have found their fleshy 

 portions connected; and in one subject the opening for the gluteal 

 artery was the only appearance of the interval which normally separates 

 these muscles. This mode of coalescence I have seen in a species of 

 Cebus, C. apella. 



10. The palmaris longus I have once found coalescing with the 

 flexor digitorum sublimis, as before mentioned. This is the natural 

 arrangement in Cebus. 



1 1 . Another variety of coalescence has been previously described 

 as existing between the palmaris longus and the flexor carpi ulnaris. 



12. The outer edge of the brachialis anticus was occasionally inse- 

 parable from the inner border of the supinator longus ; in these cases 

 the musculo- spiral nerve passed in a deep tunnel below the connecting 

 fibres. 



13. The deep head of the flexor pollicis brevis manus not unfre- 

 quently was inseparable from the adductor pollicis, except at the spot 

 where the deep palmar branch of the radial artery passed between 

 them. 



The union of muscles by connecting muscular or tendinous slips 

 is of frequent occurrence, and I have seen it taking place with the 

 following : — - 



1. The lower border of the great pectoral, and the upper edge of 

 the external oblique, which have been very often so distinctly con- 

 nected that fibres and fasciculi may be easily traced from the tendon at 

 the bicipital groove to the linea alba at the umbilicus. 



2. The coraco -brachialis and brachialis anticus I have found 

 united by some fibres ; and this anomaly Meckel has thought of very 

 great importance, as establishing the homotypical place of these 

 muscles, as shall be noticed hereafter. 



3. The extensor ossis metacarpi pollicis and primi internodii pol- 

 licis were not unfrequently connected by the interchange of muscular 

 or tendinous fibres, and in one case coalesced for their whole extent, ex- 

 cept from the groove in the radius to the separate insertions of the two 

 divisions of the tendon. The same occurs in Inuus sylvanus and Cyno- 

 cephalus p or car his. 



4. The flexor sublimis and profundus often interchange muscular 

 bundles ; and, 



5. The flexor profundus and flexor pollicis frequently are united 

 by a similar interchange of slips. In one case the flexor tendon 

 for the index finger mainly arose from the flexor pollicis ; or, conversely, 

 fibres often run from the flexor profundus to the flexor pollicis. 



E. I. A. peoc. — VOL, ix. 3 p 



