248 



FRANKLIN P. MALL 



Schema B. The chief muscle buudlcb which have been described arc ri von. Tlie 

 bulbo-spiral group of fibers are in red and the yino-spiral in blue. The bundles 

 immediately around the left ostium and tlie conns form single loops which attacli 

 themselves to the aortic septum. All other bundles may be considered modihcia- 

 tions of these two simple loops. 



