Parker and Davis. — Heart blood vessels in fishes. 
PLATE 2. 
Fig. 3. Ventral view of the heart ancl the adjacent vessels in Amia calva. 
Fig. 4. Dorsal view of the heart and attached vessels of Carcharias. The 
auricle has been removed. 
Fig. 5. Dorsal view of the heart of Raja with the venous sinus laid open and 
the posterior coronary arteries shown. 
Fig. 6. Dorsal view of the heart and the coronary artery in Amia. The 
auricle has been removed. 
