...Arnoldus Schytte Blix; Lars Walløe; Edward B. Messelt SUMMARY Whales are unique in that the supply of blood to the brain is not by the internal carotid arteries, but by way of thoracic and intra-vertebral arterial retia. We found in the harbor porpoise ( Phocoena phocoena ) that these retia split...

... on the surface of the forehead of two harbor porpoises ( Phocoena phocoena ). It has long been hypothesized that the special lipids found in the melon of odontocetes, and not in any other mammals, focus sounds produced in the nasal region that then propagate through the melon, producing a beam...