TINAMI 489 



In Tinamus solitarius the intrinsic muscles are large and 

 are inserted upon the fifth or sixth bronchial semi-ring. In 

 Bhynchotus ru/escens they are also large, but attached 

 higher up. 



The muscles ' of the tinamous are remarkable on account 

 of their soft texture and pale colour. The pectoralis I. is 

 very large and meets its fellow of the opposite side and for 

 a considerable portion of its extent. The actual junction of 

 the fibres is prevented by a fibrous septum, which is a con- 

 tinuation of the carina sterni. The second pectoral is also 

 large. The tensor patagii tendon is a broad diffuse band, as 

 in gallinaceous birds ; it has no biceps slip unless a muscle 

 that will be referred to in connection with the biceps 

 immediately really represents this. The biceps itself pre- 

 sents no remarkable features, but a kind of accessory biceps 

 runs along the front of the humerus, which is quite distinct 

 from the biceps proper ; I have found this both in Calo- 

 dromas and Bhynchotus. This is regarded by Purbeingbr 

 as part of the coracobrachialis externus. 



In Grypturus (as also in gallinaceous birds and sand 

 grouse — a noteworthy fact, perhaps) the pectoralis abdomi- 

 nalis has a remarkable ending. 



Instead of being inserted directly upon the humeral crest 

 it ends upon a tendinous bridge, to which are also attached the 

 pectoralis, the latissimus dorsi posterior, and the expansor 

 secundariorum. 



The tinamous have the gallinaceous muscle iii the fore 

 arm and the expansor secundariorum. The anconeus has a 

 humeral slip. 



In Orypturus tataupa and Nothura maculosa at any rate 

 the expansor secundariorum ends in a tendon which is 

 inserted on to the scapula on the one hand and the manu- 

 brium sterni on the other. 



The tinamous have the complete muscular formula of 

 theleg, i.e. ABXY-f-. 



' Alix, ' Sur la Myologie du Bhynchotus rufescens,' Jov/rn. de Zool. v. (1876), 

 p. 411. ' M6moire sur I'Ost^ologie et Myologie du Nothura mcyor,' Journ. 

 2001. iii. 1874, pp. 167, 252. 



