432 



C. H. DANFORTH 



"■ ^f- a. he. a. v hp 



8. he. p. a. he. p. 



Fig. 13 Outline of liver showing main branches of anterior and posterior 

 hepatic arteries. 



of any other forms with vessels of this type and has no sugges- 

 tion as to their possible homologies. They are not mentioned 

 by either Allen or Allis in the papers cited. 



The terminal branch of the 'coronary artery' (fig. 11, a.cn.) 

 or the part which actually supplies the heart and seems to corre- 

 spond to the posterior coronary of the skate, is generally, but not 

 always, best developed on the right side. The smaller artery 

 is, in all but exceptional cases, an insignificant vessel that runs 

 toward the heart along the large coronary vein. The larger 

 artery crosses the posterior part of the pericardial cavity in a 

 free strand which also contains the small coronary vein. It 

 passes under the auricle to the dorsal aspect of the ventricle 

 (fig. 11) where, at a point slightly behind and to the right of the 

 auriculoventricular junction, it breaks up into three or more 

 branches. Like other arteries approaching their final distri- 



