Volume I.

=Protozoa=, by MARCUS HARTOG, M.A., D.Sc.; =Porifera= (=Sponges=), by IGERNA B. J. SOLLAS, B.Sc.; =Coelenterata and Ctenophora=, by S. J. HICKSON, M.A., F.R.S.; =Echinodermata=, by E. W. MACBRIDE, M.A., F.R.S.

FIELD.—“The book can be in the strongest manner recommended to those for whose benefit it has been written. We know of no work from which a more truly scientific account of the Protozoa, Echinodermata, and other lower forms of animal life could be gained.”