646 



BB. P. CHALMEUS MITCH15LL OK THE 



[Dec. 17, 



but is partly covered by tbe flesby belly of the posterior muscle. 

 Practically the same condition exists iu Cariama 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 Gms, according to Gadow, while in Balearica 

 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 



ILtJIBI. 



Text-fig. 79. 



iCMM-ILFcH 



/L:T/B.I, 



/LtT/B 



f£M-T/3.E. 



Tliigli-muscles of Psophia leucoptera ; riglit thigh, external view. 



IL.-TIB. Ilio-tibialis. IL.-TIB.I. Ilio-tibialis internus. IL.TE., A., M., 

 P. Ilio-trochanterici, anterior, medius, and posterior. IL.TR.E. Ilio- 

 femoralis externus seu ilio-trochantericns externus, seu gliitseus anterior. 

 FEM.-TIB. Femoro-tibialis, the distal portion cut and reflected. FEM- 

 TIB.E. External deep slip of femoro-tibialis. IL.-FIB. llio-fibularis seu 

 biceps. ISC.-FEM. Ischio-femoralis seu obdurator externus. (CAUJ))- 

 IL-FEM. Iliac division of the caud-ilio-femorali.s (accessory femoro- 

 caudal). CAUB.-IL.-FLEX. Caud-ilio-flexorius. IHC.-FLEX. Ischio- 

 flexorius. FUB-ISC.-FEM. Pub-ischio-femorales seu addiictoi-es longus 

 et magnus. 



The tendinous areas are dotted. 



division in the tendon of insertion. In the Rallidae, Araminaj, 

 EhinochetidiE, and Heliornithidae the posterior and anterior muscles 

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

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



