22 AET. S. 1. IKEDA : THREE IS^EW AND 



composed of tall cylindrical cells (figs. 26-28, ep.). While it 

 presents a smooth surface against the cuticle, the internal contour 

 is irregular, owing to the fact that the inner ends of the com- 

 ponent cells are produced into a few number of finely tapering 

 and branching processes as had been observed by many previous 

 investigators (fig. 27). The processes penetrate for a short distance 

 into the cutis and anastomose with one another as well as wdtli 

 the connective-tissue fibers of the cutis. At places they are 

 further seen to stand in connection with certain processes of sub- 

 epidermal ganglion cells (?i.c.), which again are directly traceable 

 to comparatively thick nerves {ii.) running in the cutis. In rare 

 instances I have observed in the epidermis small compact groups 

 of club-shaped epidermal cells, which were somewhat sunk into 

 the cutis with their swollen inner end {s.o.). It looked very 

 much like a sense-organ and I am greatly inclined to consider 

 it to be one, although no hair-like appendage could be made out 

 at the outer end of the cells. 



Here and there among the ordinary epidermal cells are found 

 those which look very much like a mucous cell (figs. 27 and 28, 

 gl.). They are of a swollen appearance, due to the clear secretory 

 contents ^Yhich press the cytoplasm and nucleus against the cell 

 base. As Jameson has said, the glandular cells in question — for 

 they are without doubt unicellular glands — show no external 

 opening. Quite another kind of unicellular glands is numerously 

 met wdth in the larger dermal papillœ (fig. 28, g.gL). Here we 

 have to do with elongate club-shaped cells of a large size, which 

 lie for the greater part of their length imbedded in the cutis 

 and whicli with their distal narrowed end pass between epidermal 

 cells and finally open externally each with a pore through the 

 cuticle. I distinguish two varieties of the glandular cells in 



