332 



ELEMENTARY ANATOMY. 



[LESS. 



muscle, a peculiar flexor brews manns which takes origin 

 from the palmar fascia. 



The flexor profundus digitorum in man possesses an ex- 

 ceptional distinctness and subdivision. As has been said, it 

 may be intimately united with the siiblimis, as it may also be 

 (even in Monkeys) with the flexor longus pollicis. When dis- 

 tinct from the latter, it may yet send a tendon to the thumb, 

 as mNycticebus. It may end in but one, or at most two ten- 

 dons, as in Birds. In the complete separation of this muscle 

 from the one next mentioned, man differs from all the Apes. 



Flexor longus pollicis. This muscle is very commonly 

 completely united with that last described, as e.g. in Echidna, 



FIG. 300. Di. GXAM OF FLEXOR TENDONS OF HAND OF NYCTICEBUS. 



The numbers indicate the digits (from the pollex to the minimus) to which the 



tendons go respectively. 



F Jp, flexor longus pollicis ; F /, flexor profundus digitorum ; Fs, flexor sublimis 

 digitorum. 



Dasypus, and even in the Apes. The two united deep flexor 

 muscles (profundus and longus pollicis) may fail to send any 

 tendon at all to the two or three ulnar digits, as is the case 

 in Bats. When the two deep flexor muscles are distinct, 

 the longus pollicis may send tendons to all the digits, uniting 

 variously with those of the flexor profundus, as in Nycticebus, 

 Lori's, and Chameleo. It may send no tendon to the pollex 

 in a form closely allied to man, i.e. in the Orang. 



Lumbricales. These may be altogether absent (as in Birds, 



