Dolphins are very agil, clever, play, "speak", and help swimmers
in distress of the sea. Dolphins, and also harbour porpoises
have a highly developed echolocation System, and orientated
themself by the echo of her sounds. Dolphins have a highly
sensible tough sense, and also all the senses like other
mammals. The limbic layer of the dolphin brain has much more
folds and windings than human brains. In his architecture the
dolphin brain is the highest developed brain of all mammals. But
up to date the level of efficience of the doplphin brains is
unknow. I present a description of the architecture and the
cytoarchitecture of the cortical limbic formation of the harbour
porpoise brain. Analyses include the number of the cortical
laminae, their thickness and the form, and the densities of the
neurons and glia cells. Comparisons have been made between
dolphins and human cortices. All results were finaly used to
produce the first map of cortical fields of the harbour porpoise
brain. Last thisis a trial to find out