10 Mr. W. A. Forbes on the late Professor Gorrod's 



lete after reaching the knee, becoming lost in the capsule of 

 the knee-joint. In all Passerine birds, and some others, it 

 is always absent. 



(2) The gluteus primus. — In Garrod^s earlier papers this 

 muscle is called the " tensor fascia ;" and it is described under 

 that name in the first of the two papers quoted. 



Like the four next muscles, this lies on the upper (or outer) 

 surface of the thigh, and with them may be seen in the an- 

 nexed figure. It is entirely superficial, lying beneath the 



Fisf. 5. 



Outer view of riglit thigh of Gallus bankim, partially dissected 

 (from P. Z. S. 1873, p. 627, fig. 1). 

 P, puhis ; R, rectrices ; s, sartorius ; v e, vastus esternus ; tf gluteus 

 primus (cut) origin aud insertion ; h o, biceps origin; b i, biceps inser- 

 tion ; / c, femoro-caudal ; afc, accessory femoro-caudal ; s t, semi- 

 tendinosus, ast. accessory femoro-caudal ; Ad, adductor. 



skin, and not requiring any dissection for its display. More 

 or less triangular in shape, it arises " from the whole length 



