1898.] ATifATOMT or PBDETES CAPPER. 869 



for its great development over the gluteal region and outer part of 

 the thigh (see fig. 3). 



The platysma, dorso-hutneralis, and abdomino-humeralis are also 

 well marked. The sphincter colli is feeble and does not extend 

 back superficial to the pectoralis at all. 



The Latissimus Dorsi comes from the last three ribs and lumbar 

 fas(;ia ; it hardly reaches the thoracic spines. Its tendon wraps 

 round and is inserted ventral to that of the teres major. 



The Trapezius in the Dipodidae is di^nded into an anterior and 

 posterior part, a distinct gap intervening between them. In 

 Pedetes the muscle is quite continuous as in man. 



The Bhomboideus Capitis, Colli et Thoracis form one continuous 

 sheet as in most hystricomorphine rodents. 



The Levator Am/idi Scapidcv and Serratus Magnus rise from all 

 the cervical transverse processes and from the first rib, then there 

 is a gap, after Mhich the origin is continued from the 3rd to the 

 7th ribs. The first part is inserted into the wliole of the vertebral 

 border of the scapula, the second part only into the angle. 



The Serratus Dorsalis (S. posticus) in the Dipodidae is hardly 

 developed at all. In Pedetes both the thoracic and lumbar parts are 

 well marked, the former being attached from the 4th to the 9th 

 ribs, the latter from the 8th to the 12th. 



The Transversalis Colli is large and attached from the 2t)d t 

 the 7th cervical vertebrae. 



The Transversalis Capitis or Trachelo-mastoid is absent. 



The Splenius Capitis was present as usual ; a small Spleniiis Colli 

 was inserted into the transverse process of the atlas only. 



The CompUxus could not be separated into two parts. A linear 

 V-shaped intersection occurred in it, the apex of the V being 

 downwards. 



The External Oblique rises from the third to the last rib. 



The Internal Oblique and Transversalis were easily separable in 

 the lateral part of the abdominal wall. 



The Eectus ventralis (Abdominis) rises from the crest of the 

 pubes, but does not decussate with its fellow of the opposite side ; 

 it is continued forward to the first rib, and there are five tendinous 

 intersections in its coiu'se. 



The Supracostalis is well marked ; it rises from the sternum, 

 opposite the attachment of the first two rib-cartilages, by a mem- 

 branous origin and is inserted into the first rib opposite the 

 insertion of the scalenus. It is, of course, superficial to the rectus 

 ventrahs and deep to the pectorals. 



The llio-tibialis (Sartorius) runs from Poupart's ligament to 

 near the patella, where it is lost in the fascia ; it is supplied by the 

 anterior crural nerve. 



The Tensor Fascice Femoris continues the plane of the last muscle 

 outward ; it reaches the lower third of the thigh. 



The Ectogluteus continues the plane of the last and has the 

 typical mammalian characteristics; it is inserted just below the 

 great trochanter. Externally it is continuous with the Cauda- 



