646 



DB. P. CHALMERS Mri'fHKI.J, m\ ill I. 



[Dec. 1 



but is partly covered by the fleshy belly of the posterior muscle. 

 Practically the same coudition exists in Gariama and in Eurypyga, 

 although in the latter the medius is extremely small. In the 

 Gruiuae the anterior and posterior muscles are as in Psophia, but 

 the medius is absent in Grits, according to Gadow, while in Bake run 

 I found it present although small. In Otis a single very broad muscle 

 represents the anterior and medius, and there is just a trace of 



I L- JIB I. 



Text-fig. 79. 



'CMJDJrILFEH 



/LtT/B 



Thigh-muscles of Psophia leucoptera; right thigh, external view. 



/L.-7//J. Ilio-tibialis. IL.-T1B.I. Ilio-tibialis interims. IL.TB., A.. J/.. 

 P. Ilio-trochanterici, anterior, medius, and posterior. IL.TB. K. Iliu- 

 femoralia externus seu ilio-trochantericns externum, sen glutaeus anterior. 

 I EM. -TIB. Femoro-tibialis, the distal portion ent and reflected. FEM.- 

 Tl '/I.E. External deep slip of femoro-tibialis. 11..-FJB. Ilio-h'bularis seu 

 biceps. ISC.-FEM, Ischio-femoralis seu obdurator externus. (L'At'L))- 

 IL-EEM. Iliac division of the caud-ilio-femoralis (accessory feinoro- 

 caudal). CAUD.-IL.-FLEX. Oaad-ilio-flexorius. 18C.-FLEX. Ischio- 

 flexorius. PFB-ISC.-FEM. Pub-ischio-femorales seu adductaree longus 

 et magnus. 



The tendinous areas are dotted. 



division in the tendon of insertion. In the ltallidae, Araminae, 

 Khinochetidae, and I Jeliornithidae the posterior and anterior muscle* 

 are as in Psophia, but there is no separate medius. This apparent 

 absence may be due to disappearance of a separate medius ; and the 



