APONCHIUM 



299 



are slung in a rather fine net-work of protoplasm. The lateral fields are fully 

 one-third as wide as the body. The renette cell is not yet fully understood. 

 There is a series of rather prominent cells a short distance behind the base of the 

 neck on the ventral side of the intestine which undoubtedly constitutes the 



X750 



renette. In one typical specimen these cells were arranged as follows: First, 

 an elongated-ellipsoidal cell, which failed to take the carmine stain, but con- 

 tained a distinctly stained nucleolus in its nucleus. This, was followed by a cell 

 which stained rather strongly, which in turn was followed by a pair of cells which 

 did not stain, except in their nuclei; these two cells were arranged side by side, 

 and were the largest of the series, being nearly half as wide as the body, and 

 nearly twice as long as wide. Behind this pair of cells there was a single cell 



