WM. A. KEPNER AND W. H. TALIAFERRO. 



EXPLANATION OF PLATE I. 



FIG. i. Sexually mature specimen seen from left side. The ovary with oocytes 

 and oogonia shown lying bj' the left side of enteron. V, vagina; M, mouth leading 

 into pharynx; CP, ciliated pit. Scale, I millimeter equals 7.5 micra. 



FIG. 2. Ciliated pit arising from the epidermis. E, epidermis; FC, cells at 

 fundus of pit. Xi,5oo. 



FIG. 3. Gustatory epithelium of pharynx. The basal ends of the cells lying 

 directly upon the nerve commissure. N, part of the nerve commissure. X 1,500. 



FIG. 4. Sagittal section of ciliated pit. DN, dorsal, lateral nerve upon which 

 the basal ends of the sensory cells rest; G, glandular cells of fundus; G', a glandular 

 cell which presents a duct leading into lumen of the pit. X 1,500. 



