050 



UK. P. CHALMElt* MITCHELL (_»' THE 



[Dec. 17. 



middle head. Secondly, the special tendon from the raphe of the 

 caud-ilio-flexorius seen in the Ralline type (text-fig. 81, A. 1) is 

 absent in the Animus type. 



Text-fig. 81 

 f{M-T/8J 



Text-fig. 82. 



Knee-muscles of Bolhis lottgirostris. Knee-muscles of Aramus scolopaceus. 

 Musculature of knee ; right leg, internal view. 



FEM -TIB.-I. Internal separate slip of femoro-tibialis (vastus internus i. 



.t. Ligament from femur to tibia. 



P.l.F. Pub-ischio-femorales (adductors). 



C'.I.L. Caud-ilio-flexorius (semi-tendinosus). C.I.L.l. Femoral insertion 

 of caud-ilio-flexorius (accessory serui-tendiuosus i. 



I.F. Ischio-flexorius (semi-membranosus). 



A. J. Anchor to tibia of C.I.L. 



A. 2. Anchor to tibia of I.F. 



Gc. 1. External femoral division of gastrocnemius. 



Gc.B. Internal femoral division of gastrocnemius. 



Gc.o. Tibial division of gastrocnemius. 



SOL. Soleus. 



In text-figure S"J the caud-ilio-flexorius has had a piece removed to 

 exhibit the deeper lying Gc. 2. 



The tendinous areas are dotted. 



(3) Otis type. This (text -fig. S3) differs from the Aramus type 

 first in that the femoral insertion of the caud-ilio-flexorius is much 

 narrower than, proximal to, and parallel with, the posterior femoral 

 head of the gastrocnemius, so that there is no longer need of cutting 

 the former to display the latter (text-fig. 83, C.I.L. 1 & Gc. 2). Its 

 fibres meet the fibres of origin at a raphe as in the others, and the 

 ischio-flexorius fibres join the muscle-mass at the lower half of the 

 raphe. From this meeting-point a broad tendon (A. 2) runs to t he 

 tibia, obviously corresponding to the normal insertion of the ischio- 

 flexorius, while the muscular masses along with the posterior femoral 

 head of the gastrocnemius converge to a round tendon that joins 



