162 Prof. A. Macalister on the }fyohgy of 



this dorsi epitrochlear to the sartorius I have elsewhere sug- 

 gested ; and in the light of the modification of the last-named 

 muscle in the sloth (Ann. & Mag. Nat. llist. July 1869), in 

 which the origin of the muscle is tendinous from Poupart's 

 ligament, and not from the bone, the homology is still more 

 striking. 



A subanconeus, from the lower sixth of the humerus to the 

 synovial membrane of the elbow-joint, is present in the Tas- 

 manian Devil ; but I have not found it in any of the others. 



The pronator radii teres in the Wombat is well developed, 

 and passes from the inner condyle to the lower half of the 

 radius. In SarcophiJus it is smaller, and is attached to the 

 middle third of the radius. In the Opossum and Phalanger 

 it resembles the last in disposition ; but in Macrojms giganteus 

 and Bennett n it is inserted into the upper third of the radius. 

 No coronoid slip was present in any of these marsupials. 



The pronator quadratus Avas very weak in the Womjjat, 

 and occupied the lower third of the forearm. In Sarcoj)hi/iis 

 it extends for one-half, but is very thin, and occupies very 

 little of the surfaces of the radius and ulna, merely lying- 

 in the space intervening between the bones. In Macropus 

 Bennettii and giganteus it extends for rather more than the 

 lower four-fifths of the interosseous space ; it is similar in the 

 Opossum as well as in the Plialanger and Perameles. 



The flexor carjji radialis in the AYombat passes from the 

 inner condyle to the second metacarpal bone. In Sarco- 

 phiJus it sends an additional slip to the trapezium. In M. 

 Bennettii it is inserted into the same bone or into the meta- 

 carpal bone of the thumb according to Prof. Haughton (P. R. 

 I. A. 1866, p. 83). Its attachments are similar to those in the 

 Wombat, in the Phalanger, Opossum, and Bandicoot. 



The palmaris longus in the Wombat arises as usual, and is 

 inserted by a flat tendon into the palmar fascia ; it is present 

 and similarly arranged in Perameles lagotis, Macropus gigan- 

 teus and Bennettii. The palmaris accessorius, the commonest 

 anomaly of this muscle in human anatomy, exists along with 

 the tmc palmaris longus in the Wombat ; and, like a very 

 common human variety of the muscle (figured in the ' Pro- 

 ceedings of the lioyal Irish Academy,' vol. ix. pi. 8. fig. 2), 

 it arises by a flat tendon from the inner condyle ; this soon 

 becomes fleshy, and ends in a tendon which, passing through 

 a special groove in the annular ligament, is inserted into 

 the pad in the ])alm of the hand. This is the variety of 

 the muscle existing in Sarcophihis, the Opossum, and Pha- 

 langer. 



The flexor carj)i ulnaris in the Wombat arises by two heads 



