1899.] TTTF. ilTOLOGT OF THE EDENTATA. 333 



the annularis and minimus were supplied by slips from the ole- 

 cranon and the surface of the flexor profundus. We are, however, 

 not sure -whether some of these factors should not rather be 

 referred to the palmaris longus. In 30 the flexor sublimis passed 

 from the condyle to the medius only ; before being perforated by 

 the profundus in the theca it had the usual ring passing deep to 

 that tendon. In ('29) and (31) no flexor sublimis was seen. Of the 

 other specimens, (34) had also a slip for each digit, whilst (33) 

 resembled (29) and (31) in having no sublimis at all. In Orycteropus 

 (35, 36, 37) there were in each case four tendons for the four 

 digits. 



Flexor carpi ulnaris, — As usual, this muscle rises from the 

 internal condyle, olecranon, and margin of the ulna. The condylar 

 and olecranal heads unite in the forearm to be inserted into the 

 pisiform. In Bradypus (1, 3, 5) the tendon, instead of ending in 

 the pisiform, was inserted into the base of the most ulnar of the 

 three metacarpals. In Cyclothurm (13) the muscle is very large 

 and important in function ; the pisiform, a fact no doubt correlated 

 with that just mentioned, is also very large. 



Flexor profimdu,s digitorum. — In the Bradyjjodidce, Bradypus 

 (1, 2, 3, 5) has radial, ulnar, and coudylo-ulnar heads and divides 

 into three tendons for the thi-ee digits. In our own specimen of 

 Cholcejms (8), radial, ulnar, condylo-central, and condylo-ulnar 

 heads were present, and this seems also to have been the condition 

 in 9 and 10. The muscle ends in two strong tendons. In the 

 Myrmecophagidce, Myrmecopihaga has a head continuous with the 

 lower part of the triceps and already described in connection with 

 that muscle. In addition to this it possesses radial, ulnar, and 

 condylar heads. It is a very large muscle and has a variable in- 

 sertion. In Pouohet's specimen (12) a sHp was given to the pollex, 

 but in that at the E.C.S. there were only three tendons, neither 

 pollex nor minimus receiving one. In one specimen of Tamandua 

 (15) a humeral head was present, but we failed to find it in our 

 specimen (14). In this instance, however, the factors were much 

 united, and we with difficulty identified radial, ulnar, condylo- 

 ulnar, and condylo-central portions. In one specimen (15) the 

 tendons passed to all five digits, whilst in the other (14) the 

 pollex was not supplied with one. In Cyclothurus (17, 18, 19, 20, 

 21) we have no records as to which condylar heads are present, 

 but the muscle only possesses two tendons, which pass to the 

 second and third digits respectively. In Daaypus (22, 23, 24), 

 Tatusia (25, 26), and Chlamydophorus (27) the muscle is very 

 large, the ulnar portion being specially well developed. In all 

 these animals a strong fibro-cartilaginous sesamoid is developed in 

 the pahnar part of the tendon before its division, beyond Avhich 

 slips are given off to all the five digits. In two specimens of 

 Manis (30, 32) there were condylo-ulnar, radial, and ulnar heads 

 present. In another (29) the condylo-centralis was present in 

 addition. A palmar sesamoid is present as in the Armadillos, but 

 not to such a marked extent. There may or may not be a small 



