Of the principal families, the Acanthopterygii, which are abundant in the hotter parts of India, hardly enter the mountains, two genera only being found, of which one is the peculiar amphibious genus Ophiocephalus.
The rodents are numerous and include most, if not all, of the Amazonian species - the capybara (Hydrochoerus capybara), cavia (C. aperea), paca (Coelogenys paca) and cutia (Dasyprocta aguti), all amphibious and having an extensive range.
Gulls and amphibious birds abound in large variety; three kinds of penguin have their rookeries and breed here, migrating yearly for some months to the South American mainland.
The fact that the semi-wild tribes, which are ethnologically Malayan and distinct from the aboriginal Semang and Sakai, are met with almost invariably in the neighbourhood of the coast would seem to indicate that they reached the peninsula by a sea, not by a land route, a supposition which is strengthened by their almost amphibious habits.
A very prolific rodent of the amphibious class obtained from Canada and the United States, similar in habit to the English vole, with a fairly thick and even brown underwool and rather strong top dark hair of medium density.
The principal characteristic of the mink in comparison with its congeners is its amphibious mode of life.
Of the amphibious rodents, the pi-ea (Cavia aperea), mod, (C. rupestris), paca (Coelogenys paca), cutia (Dasyprocta aguti) and capybara (Hydrochoerus capybara) are noteworthy for their size and extensive range.
The conclusion arrived at on that occasion had, however, been that, whether the campaign were to take the form of a purely naval operation or whether the task were to be performed by an amphibious expeditionary force, the enterprise was bound to prove most difficult.
The single genus (Isoetes) contains about fifty, mostly aquatic, species, though a few are amphibious or terrestrial.
Is of the amphibious class and is found throughout North America and in Russia, China and Japan.