Page:Geological Evidences of the Antiquity of Man.djvu/227

Rh We are indebted to Mr. Searles Wood, F.G.S., for an admirable monograph on the fossil shells of these British pliocene formations. He has not himself given us an analysis of the results of his treatise, but the following tables have been drawn up for me by Mr. S. P. Woodward, the well-known author of the 'Manual of the Mollusca, Recent and Fossil' (London, 1853–6), in order to illustrate some of the general conclusions to which Mr. Wood's careful examination of 442 species of mollusca has led.

Recent.

Per-centage of Recent.

Northern Species.