THE AXIAL GRADIENTS IX HYDROZOA. 



189 



the perisarcal tubes, and each has branched. In the later history 

 of this case the coenosarc of the larger lateral branch and that of 

 the main stolon from which it arose became separated and each 

 pursued its o\vn course, the tip continuing to grow at the expense 

 of more basal regions. The shorter lateral branch on the other 

 main stolon is undergoing resorption at the stage figured and 

 later was completely resorbed. Occasionally a growing stolon 

 lr.i\t> .1 part of the larval body behind as in Fig. 28. This 



