Hydrus stokesii.

Hydrus stokesii.

This species is the giant of the genus, being very many times larger than the Hydrus major of Shaw (Pelamis shawi, Messem.) from the coast of India.

It is figured and described in the Appendix, by Mr. J.E. Gray, as Hydrus major, and measured eight feet one inch in length, by three inches broad; the colour was a dark yellow: several smaller ones striped brown and white were also seen.