491 



Arising from the lower half of the linea aspera, and from the back of 

 condyloid pit at the inner condyle, and inserted into the pinneeform 

 tendon of the semimembranosus. It will be observed that the plane of 

 the semi. m. lies exterior to those of the semitendinosus and adductores 

 magnus and longus. 



4. M. semitendinosus, 1*01 , A ~ 



1-8/ • • 1,40oz - 



Arises from the posterior ends of the ischium and pubes (Pigs. 28 and 

 30, s. t), and terminates partly in a delicate tendon running into the 

 tendon of the plantains, and partly in a tendon inserted into the side of 

 the tibia (1 -J inch down). 



5. M. gracilis (A), 1-0 j _ > 1-45 oz , 



;; (E) ' :::::::: ?}}• • 



There are two muscles in the Emu, neither of which are entitled to 

 be regarded as pectinceus or adductor brevis, and both present certain 

 analogies with gracilis. I shall regard them as gracilis (A), and 

 gracilis (B). 



(A) . Takes its origin from the anterior spine of the pubes, and a 

 line two inches in length behind it on the pubes (Pig. 28, gr.) ; and is 

 inserted by a line three inches long into the edge of the inner border of 

 the vastus internus (1 ) at its lower extremity. 



(B) . This muscle is double headed ; one head being supplied from 

 the pubic bone, immediately behind the anterior spine ; and the other 

 head taking its origin from the upper inch of the linea aspera of the 

 femur ; the tendon of the united muscle is strong and flat, and is in- 

 serted into the inner side of the head of the tibia. 



6. M. sartorius, 6*2\ QA 



9-4/ • • ' 80 oz - 



Its origin is marked Fig. 28, s. s., and its insertion is made by a 

 flat tendon into the inner side of the head of the tibia. 



7. M. rectus femor is (Qu. gracilis (A) or (B)), none. 



8. M. vastus externus, No. 1, ..... . 7'2\ Q er . 



io-o) • • 8 60oz - 



Takes its origin all round the rim of vastus externus (2), which is com- 

 pletely covered by it, and from the surface of the outer front of the 

 femur marked in Fig. 29, v. e. 1 ; and is inserted into the cartilaginous 

 patella, like the ordinary rectus femoris, but rather towards the 

 outer side. 



9. M. vastus externus , Iff 0. 2, 0*801 ltnn 



1-20J ' * 1UU0Z ' 



Takes its origin from the surface marked on the outer side of the femur 

 Fig. 29, v. e. 2 ; and is inserted by means of a strong tendon (passing 



