AK ATOMY OF THE PIG- FOOTED BANDICOOT. 73 



The Adductor Mass is with difficulty separable into two planes : 

 the more anterior is adductor longus aad is inserted into the 

 middle third o£ the femur ; the rest comprises the brevis and 

 magnus and is attached to the lower half of the femur. 



The Gracilis is single and has the usual attachments ; below it 

 is slightly connected witli the semitendinosus. 



In the Quadriceps extensor cruris there is absolutely no 

 reflected head to the rectus femoris, while the vastus externus is, 

 as usual, larger than the ititeruus. 



The Short Rotators of the Hip show nothing of special 

 interest. 



The Semitendinosus rises from the anterior caudal vertebrae 

 and the tuber ischii ; in the lower part of the thigh it divides 

 into two parts, the larger of which has the usual insertion into 

 the inner side of the top of the shaft of the tibia, while the 

 smaller slip joins the insertion of the biceps on the outer side of 

 the leg. From the insertion of the internal, larger part of the 

 muscle, a tendinous cord runs down along the inner side of the 

 tendo Achillis to be inserted into the tuber calcis. 



The Semimembranosus and Presemimemhranosus are closely con- 

 nected in their whole extent ; they rise from the tuber ischii, and 

 in the lower part of the thigh the presemimemhranosus is inserted 

 into the lower fourth of the back of the femur, while the semi- 

 membranosus passes as usual to the inner side of the head of the 

 tibia deep to the internal lateral ligament. It is interesting to 

 notice that between the presemimemhranosus and the adductor 

 mass there is no connection at all. 



The Tibialis anticus rises from tlie upper fourth of the 

 external surface of the tibia ; it has no femoral origin and is 

 inserted into the base of the metatarsals of the rudimentary 

 index and medius toes. 



There is no Extensor proprius hallucis. 



The Extensor longus digitorum is peculiar : it rises close to the 

 tibialis anticus from the upper fourth of the outer surface of the 

 tibia and divides into two planes; the more superficial of these 

 sends one long tendon to the middle and distal phalanges of the 

 big annularis toe, while the deep plane sends a similar tendon to 

 the proximal phalanx of the same toe. 



The Extensor brevis digitorum is reduced to a mere fibrous 

 band which runs from the calcaneum to the extensor tendon. 



The Peroneus longus rises from the head and upper fourth of 

 the fibula, it runs through a bony tunnel in the sole and is 



