52 Proceedings of the Royal Irish Academy. 



latissimus dorsi and by an inscription from teres major, and from the 

 former of these two muscles dlone, in N. fusca and Martes, it is inserted 

 as usual into the olecranon. The anconei are united to biceps in N. 

 narica; anconeus internus arises from the supracondyloid process in 

 N. fusca. 



Pronator radii teres ("03) arises from the usual place in all, but 

 presents a slightly different insertion in each ; in N. narica it is inserted 

 into the lower three-fourths of the radius, in N. fusca into the middle 

 third, and in Martes into the distal half of the same bone ; it was thick 

 and slightljr bilaminar in iV. narica. 



Flexor carpi radialis (-015) is normal in all. Palraaris longus 

 (•015) has two heads — one fleshy and the other tendinous in N". 

 narica ; the insertion is into the palmar fascia in all, and in the 

 marten it is connected with the superficial abductor minimi digiti ; 

 in N. narica there is an accessory palmaris, arising from the upper 

 third of the forearm, overlying the ulnar flexor of the wrist, and 

 inserted into the fascia of the palm by a slender tendon. Flexor 

 carpi ulnaris ("OS) ia bicipital, and is inserted into the pisiform as 

 usual. The two heads are united at the middle third in N. fusca. 

 Flexor digitorum sublimis arises from the flexor digitorum profundis 

 (just above the annular ligament in Martes), and is inserted by four 

 tendons into the fascia of the foar digits, the pollex not being .supplied 

 by it. Flexor digitorum profundus and flexor pollicis longus (condjdoid 

 part '06, radial -08) are united, have the usual five heads (three 

 median, one olecranal, and one radial), and send a tendon to the pollex 

 and to each of the digits ; in Martes the pollex receives its tendon from 

 the central olecranal head. There are four lumbricales in all, one on 

 the poUical side of each digit tendon. Pronator quadratus occupies 

 the lower fourth of the fore arm in all. 



Supinator radii longus ("04) is a large muscle in all, arising from the 

 external ridge of the humerus and inserted into the distal end of the 

 radius. Extensor carpi radialis longior ("02) and ex. carp. rad. brevior 

 are quite separate in JSf. fusca, and partly so in N. narica and Martes, 

 and have the usual insertions. Supinator radii brevis occupies the upper 

 two-thirds of the radius in Nasua, and the upper half in Martes, and 

 has no sesamoid bone in its origin. Extensor digitorum longus ("02) 

 arises as usual from the outer condyle of the humerus, and is inserted 

 into the dorsal aspect of each of the four digits. Extensor minimi 

 digiti ('01) is in reality an extensor of the third, fourth, and fifth 

 digits in N. fusca and Martes, sending a tendon to the dorsal aponeurosis 

 of each of those fingers ; but in N. narica there is a separate extensor 

 tertii et quarti digiti ("015), lying in the same groove as extensor 

 minimi, but distinct from it. Extensor carpi radialis ('02) has a very 

 small olecranal origin, and no ulnar one in N, narica, but is large 

 and flat in Martes with the usual origin and insertion. Extensor 

 ossis metacarpi pollicis (about "02) arises in all from the whole length 

 of the ulnar and interrosseous membrane, and is inserted into the 

 radial sesamoid of the carpus ; it is a large muscle in N. fusca. 



