212 THE ARTISTIC ANATOMY OF ANIMALS 



find that, in some of them, the sartorius is situated on the 

 aspect of the thigh which is turned to the side of the 

 trunk. 



In the dog and the cat it arises from the anterior iliac 

 spine, and from the half of the border of the bone situated 

 immediately below it ; but the fibres from this second 

 origin being hidden by the tensor of the fascia lata, on the 

 inner side of which they are situated, viewing the external 

 surface of the thigh, the muscle seems to arise from the 

 iliac spine only. 



The sartorius in these animals is divided into two parts, 

 which, in general, are placed in contact. One of these 

 fasciculi is anterior ; the other is situated further back. The 

 first is visible on the anterior border of the thigh, in front 

 of the tensor of the fascia lata, but below it inclines inwards ; 

 in its superior part also, a small extent of the internal sur- 

 face is occupied by it. The second, which, as we have said, 

 is situated further back, belongs wholly to the inner surface 

 of the thigh ; it is this portion which arises from the inferior 

 border of the ilium (this is the homologue of the anterior 

 border of the human iUac bone). 



The two fasciculi then pass towards the knee, being in 

 relation with the rectus and the vastus internus of the tri- 

 ceps. The anterior fasciculus is inserted into the patella. 

 The posterior unites with the tendons of the gracilis (see 

 below) and semi-tendinosus, and then proceeds to be in- 

 serted into the superior part of the internal surface of the 

 tibia. 



On account of their different insertions these two parts 

 receive the names of the patellar sartorius and tibial sartorius 

 respectively. 



In the ox and the horse the sartorius is still more definitely 

 situated on the internal surface of the thigh. Consisting of 

 a single fasciculus, representing the tibial sartorius of the 

 cat and the dog, it arises in the abdominal cavity from the 

 fascia covering the ihac muscle, then passes under the 

 crural arch, and terminates, by an aponeurosis which blends 

 with that of the gracilis, on the inner fibres of the patellar 

 ligament. In short, the sartorius is of interest to us in the 



