1890.] 



ANATOMY OF THE CONDOR. 



143 



With regard to the trabeculse of the Crocodile's right ventricle, it 

 is stated that " these have in Birds for the most part disappeared, vrith 

 the exception of a broad trabecula which runs from the margin of 

 the valve to the anterior ventricular wall." This is compared to the 

 fleshy bridge already spoken of in the Crocodile heart. It is, of 

 course, difficult to follow so detailed a description as that which 

 Gegenbaur gives without illusUatious ; I may therefore be wrong in 



Fig. 1. 



Eight ventricle of Crocodile opened to show auriculo-ventricular valve. 

 The fibrous parts are dotted ; the muscular indicated by lines. 



A, attachment of valve to parietes by a specially strong muscular band ; 

 B, muscular tissue iu septal half of valve. 



identifying the structure lettered A in the accompanying drawing 

 (woodcut, fig. 1) with the fleshy bridge which unites iu the Croco- 

 dile the valve with the ventricular wall, as described by Gegenbaur. 

 Its position and relations seem to me, however, to point to its iden- 

 tity with the fleshy bridge in the Bird's heart (c/. figs. 1 & 2, A). It 

 will be noticed that in the Crocodile this bridge of muscle marks 



11* 



