supporting lamella

HISTOLOGY AND DEVELOPMENT OF MYBIOTHELA PHEYGIA. 537
FIG. 18.—A Myriothela bearing buds in various stages.
FIG. 14.—Section through ciliated cell zone of the endoderm.
FIG. 15.—Goblet-cell. Osmic vapour.
FIG. 16.—Villus of goblet-cell zone.
FIG. 17.—TWO apical cells.
FIG. 18.—Loaded gland-cell and empty vacuolate cell.
FIG. 18 a.—Discharged gland-cell.
FIG. 18 b.—Intermediate condition of gland-cells.
FIG. 19.—Group of small cells from apex of villus.
FIG. 20.—Oral end of Myriothela with lip retracted.
FIG. 21.—Villus from middle region of the body, with gland-cells just commencing
to discharge.
FIG. 22.—Group of cells from the endoderm of a blastostyle. Osmic acid.
FIG. 23.—Villus from the spadix of a gonophore, showing canal-like
vacuoles in the lower portion of the cells. At a and a' these are cut across.
FIG. 24.—Two cells from the endoderm of a blastostyle. Osmic acid.
FIG. 25.—Nutritive spheres containing pigment granules. Osmic acid.
FIG. 26.—Body from the endoderm of a tentacle.
FIG. 27.—Endoderm-cell containing the large type of nutritive sphere.
FIG. 28.—Large nutritive sphere.