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.

NATURE.–"Taken in conjunction with the earlier published volumes, the work seems to fulfil the purpose of providing an intelligible and adequate survey of the entire animal kingdom without giving undue prominence to particular groups.... The illustrations are excellent."

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."

OUTLOOK.–"There is much valuable matter in these well-planned sections which will render the volume, like the others which have preceded it, a necessary book of reference in every well-equipped library."

WORMS, ROTIFERS, AND POLYZOA