It is however a coast fish, which, though entering rivers, yet lives in the sea.
_Eutropius_[151] is an African genus, but _E.

obtusirostris_ comes from India.

On the other hand, _Amiurus_ is a North American form; but one species, _A.

cantonensis_,[152] comes from China.
The genus _Galaxias_[153] has at least one species common to New Zealand and South America, and one common to South America and Tasmania.

In this genus we thus have an absolutely and completely fresh-water form _of the very same species_ distributed between different and distinct geographical regions.
Of the lower fishes, a lamprey, _Mordacia mordax_,[154] is common to South Australia and Chile; while another form of the same family, namely, _Geotria chilensis_,[155] is found not only in South America and Australia, but in New Zealand also.