In 1810, Risso, in his work on the Ichthyology of Nice, laid the foundation of what has since been termed "bathymetrical" distribution, or distribution in depth, by showing that regions of the sea bottom of different depths could be distinguished by the fishes which inhabit them.

It is described by Risso as having a majestic appearance, its shining leaves and rosy flowers being succeeded by fruit whose beauty and size astonish the observer, whilst their odour gratifies his senses.

See also the previous publications of M. Risso Journal des Mines tome 34 etc.) (***Footnote.