29 



where large clear spaces are seen, which are either inter- 

 cellular spaces or cell vacuoles, probably both. The 

 epithelium in the intestinal division (Ep.1.3) is made up 

 of much shorter cells, which bear short cilia. The free 

 extremities of these cells fit closely together, but the 

 lower ends are rather loose. Scattered abundantly 

 throughout the epithelium are large, round, oily masses, 

 staining faintly with eosin, and quite homogeneous in 

 structure. Similar bodies can be seen in the tissue lying 

 outside the epithelium. Here they are seen to be true 

 cells, with the nucleus compressed against one portion of 

 the cell wall and the greater part of the cell space filled up 

 with an oily globule. In many the cell contents are very 

 coarsely granular, and stain strongly with eosin. Others 

 are finely granular, and all transition stages between the 

 coarsely granular condition and the homogeneous appear- 

 ance, which the bodies in the epithelium present, can be 

 found. Similar oily globules can be found projecting into 

 the lumen of the intestine, or even lying free in the cavity. 

 Nuclei are not evident in these structures in the latter 

 positions. The nuclei of the ordinary cells are found near 

 their bases. Above each nucleus is a large clear cell 

 vacuole, the occurrence and position of which seem to be 

 fairly constant. 



In the sac of the crystalline style and near the anterior 

 fold is a very remarkable strip of epithelium {Ep.1.2), 

 which extends all the way from the opening of the sac 

 into the stomach to the point from which the spiral 

 division of the intestine takes origin. This appears in 

 transverse section as a crescentic area of the wall made up 

 entirely of very long spindle cells. On the left side these 

 long cells pass gradually into the epithelium lining the 

 sac of the crystalline style. On the right side they are 

 very sharply demarcated from the short cells lining the 



