120 F. H. STEWART. 



The only evidence of a secreting epitlieliuin is to be found 

 in the presence of cells with finely granular protoplasm in the 

 lumen of the ramifying canals. The lumen ;ilso contains 

 numerous sharp spherical granules which stain intensely with 

 acid dyes. 



The ducts (PI. 7, figs. 3-4, oes. d.) also lie in the muscular 

 wall, alternating with the radii of the cjcsophageal lumen, one 

 dorsal, two sub-ventral. They are elliptical in cross section, 

 and have a very fine protoplasmic liuiug. They also contain 

 the same granular material. 



On leaving the oesophagus, the ducts lie along the pharynx, 

 external to the cuticle, between two layers of the membrane 

 referred to above. This membrane also supplies them with a 

 lining as they pass up the centre of the teeth to their 

 openings. 



The intestine is about 11 "5 mm. in length, cylindrical, except 

 where it is compressed by the reproductive organs. In the 

 living animal it has a tesselated appearance from the patterns 

 formed by numerous golden-brown globules contained in its 

 wall. 



The wall is formed of columnar epithelium, from twenty-four 

 to thirty cells occurring in a transverse section. The cells vary 

 in depth from 0015 mm. near the commencement, to 0008 

 mm. near the termination. Their protoplasm does not stain, 

 and contains the golden-brown globules referred to above. 

 In certain of the cells numerous coarse acidophil granules 

 occur, strongly resembling those of the coarsely granular 

 acidophil cells of the body space, but, on the average, slightly 

 smaller. The cells containing these granules are distributed 

 in what apj^ears to be an entirely capricious manner, gener- 

 ally wedged in between cells entirely free from granules. 



I attempted to discover if there was any relation between 

 these cells and the granular cells of the body space, but was 

 unable to find any. The two kinds of cells do not occur in 

 apposition, or even, as a rule, in close proximity, and there 

 is no correspondence between the frequency of occurrence of 

 the two in different animals or in different reo-ionsof the same 



