Chap. II.
EARTH SWALLOWED AS FOOD.
107
rise like towers (see Fig. 2), with their summits often a little broader than their bases,
Fig. 2.
Tower-like casting from near Nice, constructed of earth, voided probably by a species of Perichæta: of natural size, copied from a photograph.
sometimes to a height of above 3 and often to a height of 2½ inches. The tallest of those
greatly surprised to see how closely they resembled castings sent to me from near Calcutta, where it is known that species of Perichæta abound.
