528 L. S. ROSS 
SUMMARY 
The trophospongium of the crayfish (Cambarus) motor nerve 
cell is well developed in normal animals. 
It is non-nervous in character. 
It is not identical with the Golgi canalicular apparatus, but is 
unrelated. 
It consists of partitions and capsular processes continuous 
with the gha cell intercellular support, possessing nuclei only 
rarely. 
Its structure is such that it affords mechanical support to the 
cytoplasm and possibly functionates in a nutritive capacity. 
It is very similar to that of Lophius, indicating the probable 
identity of its origin in the chordata and non-chordata. 
Drake University, 
Des Moines, Iowa 
