.-/ji 



Fig. 1. Intercellular bridge of interstitial cells. 



counters the spindle remnant, and is arrested by it for a time. This 

 occurs very commonly in mitotic divisions in many kinds of genninal 

 and somatic cells and gives rise to a transient structure called a 

 spindle bridge. Usually, however, such connections between the 

 daughter cells endure only for several minutes and then when the 

 spindle remnants have resorbed the cleavage is completed. Evi- 

 dently in the case being described here, cleavage does not resume 

 and absorption of the spindle filaments leaves the daughter cells in 

 open communication through short cylindrical bridges large enough 

 to permit mitochondria and other formed elements of the cytoplasm 

 to pass from one cell body to another. As a consequence of the 

 matter in which they are formed, there is never more than one 



Fig. 2. Intercellular bridge of cnidoblasts. 



46 



