The acervuli are numerous, gregarious, scattered over large light brown areas on the living stems, minute, circular, flat then erumpent, 132-165 mmm in diameter. (Fig. 9.)

The spores are fusoid, straight or curved, 5-celled, constricted at the septa, 21-31.6 x 6.6-9 mmm.; the cells vary in intensity of colour, tle three middle ones being olivaceous, darker in the upper two; the basal cell is usually the smallest, light olivaceous to hyaline, with a short pedicel 3-6.6 x 1 mmm. Some young, uncoloured conidia still attached to the aeervuli were found with pedicels considerably larger, up to 11.5 x 2.5 mmm., but this was only in very isolated instances. The uppermost cell is smaller than the middle ones, hyaline, conical, hearing a little below the rounded apex and continuous with the cell, usually three, simple, equal, hyaline cilia, the ends of which are most frequently dilated into a small round knob, all reflexed more or less at right angles to the long axis of the spore, 13-50 mmm. long, by 1-1.5 wide. Occasionally there may be two or four cilia, and very rarely they may fork. (Fig. 10.)

The spores germinate readily in water. The cell above the basal cell or less commonly one of the other cells, swells considerably, appearing lighter in colour than before, and puts forth a germ-tube, or two, which cuts off a wall and rapidly proceeds to form a long, sparsely septate, hyaline hypha, which eventually branches and forms the new mycelium (Fig. 11).

This species of Pestalozzia differs in many respects from the other species recorded on Rubus, most nearly resembling P. longiseta Speg. (Sacc., Syll. Fung., vol. 3, 1884, p. 787) from which it is distinguished by larger spores, shorter pedicels, and the characteristic regularly arranged clubbed cilia which are also, on the whole, comparatively shorter. The present species is therefore, considered distinct and is named Pestalozzia antennaeformis n. sp.