332 MESSES. B. C. A. WINDLE AKD F. G. PARSONS OK [Mar. 7, 



fascia of the wrist. In three specimens of CJioloepus (8, 9, 10) the 

 muscle was inserted into the scaphoid. In the Myrmecophagidce 

 the insertion was into the second metacarpal in Myrmecophaga 

 (11, 13), Tamandua (14), and Cydotliurus (17, 18), but in another 

 specimen of Myrmecophaga it was into the third metacarpal. 

 Among the Dasyj)odidce the insertion was into the trapezium in 

 Dasypus (22, 23), but in Tatusia (25) and Chlamydophorus (27) 

 into the first metacarpal bone. In the Manidai the insertion 

 vai'ies. In four specimens of Manis (29, 30, 31, 32) the muscle 

 passed to the second metacarpal only, but in two others (32, 34) 

 slips were given to the three radial metacarpals. In Orycteropus 

 (35, 36) the insertion was into the second metacarpal, but a 

 sesamoid bone was apparently developed in the tendon, a portion 

 of which was attached to the styloid process of the radius. In 37 

 it was also inserted into the second metacarpal. 



Pahnaris longus. — In six specimens of Bradypus (1, 2, 3, 4, 5, 6) 

 this muscle was present, rising from the internal condyle and 

 gaining an insertion into the palmar fascia by one or more of 

 the bony prominences about the palm. In three specimens of 

 Cholcepus (8, 9, 10) the muscle was also present. In the Myr- 

 mecopliagidce it is difficult to determine what is palmaris longus 

 and what flexor sublimis digitorum. A careful comparison of 

 the descriptions given by Macalister (13) and Pouchet (12) with the 

 College of Surgeons' specimen (11) makes us inclined to believe 

 that in Myrmecophaga the palmaris longus is absent. In Tamandua 

 (14, 16) the muscle extends from the internal condyle to the fibro- 

 cartilaginous anterior annular ligament. In Dasypus (22, 23) 

 some superficial fibres of the flexor sublimis passed to the annular 

 ligament, representing, we think, a palmaris longus, but in another 

 specimen (24) the muscle is absent. In Manis the muscle may 

 extend from the condyle and olecranon process to the palmar 

 fascia (29, 31, 33) or it may be fused with the flexor sublimis (30, 

 32, 34). In Orycteropus the muscle is either fused with the flexor 

 subhmis (35, 36) or is absent (37). 



Flexor sublimis digitorum. — In Bradyjms this muscle is always 

 absent (1, 2, 3, 4, 5, 6). In Gholmpus it is present and has two 

 delicate tendons (8, 9, 10), which are more or less connected above 

 with the palmaris longus. In I^yrynecophaga (11, 12, 13) and 

 Tamandua (14, 15, 16) it rises from the internal condyle as well 

 as the olecranon process and some of the shaft of the ulna below 

 it. It is inserted into the middle phalanx of the medius, splitting 

 to enclose the flexor profundus tendon, but not showing the ring 

 which is so evident in Rodents, Insectivores, and Carnivores. In 

 Dasypus the muscle gives tendons to the index and medius (23, 

 24) or to the medius only (22). In the Manidm the arrangement 

 of this muscle is very inconstant and various writers seem to have 

 confounded it M'ith the palmaris longus. In the two specimens 

 (29, 30) which we dissected the arrangement was quite different. 

 In 32 tliere was a slip for the poUex from the fascia of the lower 

 part of the forearm, condylar slips for the index and medius, while 



