Common hydroids, corals and echinoderms.

Bibliographic Details

Main Author:	Hyatt, Alpheus, 1838-1902 (Author)
Format:	Book
Language:	English
Published:	Boston, D.C. Heath and Company, 1897.
Series:	Guides for science-teaching, no. v
Subjects:	Corals. Sea urchins. Coraux. Oursins.