490 



PATTEN AND HAZEN. 



to end, forming long, narrow tubules. These tubules are found on the median 

 and dorsal side of the nephridial lobes. A number of small cells with large gran- 

 ules (g.c^ show on the lateral side of the lobes, x 300. 



Fig. 48. Cross-section through the fifth leg of a crab about one inch long. 

 The dorsal side of the drawing is on the right and the median at the lower margin 

 of the page. It shows sections through the nephridial duct and the end sac with 

 its long, branching diverticula. The structure of the lobe differs in different places. 

 Near the end sac it is composed of long, branching tubules, lined with cells con- 

 taining coarse granules. Outside this layer the tubule cells are smaller ; on the 

 lateral side of the lobe the tissue is aerolated. On the lateral margin are large 

 cells filled with very coarse granules. X 100. 



