285 



FIG. no. Diagram of the principal vessels in the crculation of a fish ventral 

 view, a, aorta; au, auricle; br. a., afferent branchial arteries; br.e., efferent branchial 

 arteries; bu, bulbus of the artery; c, carotid artery; c.a., caudal artery; c.v.r., right 

 cardinal vein; d.a., dorsal artery; d.c., ductus Cuvieri; g, gills; h.v., hepatic vein; h.p. 

 hepatic portal vein; *. intestine; j, jugular vein; k, kidney; I, liver; r.p., renal portal 

 vein; s.v., sinus venosus; v, ventricle. For the sake of simplicity, the auricle is repre- 

 sented as posterior to the ventricle. 





