The clitellum of E. foetida may be divided into three regions on each side of the body in accordance with the glandular elements present. Region A, which extends from the mid-dorsal line to a point just below the lateral setae, contains (a) mucin-secreting gland-cells, (b) large granule gland-cells, and (c) fine granule gland-cells. Region B, which extends from just below the lateral setae to a point just inside the inner ventral setae, contains gland-cells (a) and (b) and (c) as in Region A, and in addition (d) gland-cells occupying the ventrolateral ridge and (e) gland-cells associated with the diverticula of the setal pores. Region C, which comprises the ventral surface, contains gland-cells (a) and (b), and cells of an interstitial nature. By the use of differential stains evidence has been obtained, from a similarity of staining reactions, that the cocoon slimetube is secreted by the mucin gland-cells, the cocoon membrane by the large granule gland-cells, and the albumen by the fine granule gland-cells. The gland-cells occupying the ridge in Region B and those associated with the diverticula of the setal pores do not participate in the secretion of the cocoon.