164 University of California Publications in Zoology. [Vol.6 



Microscopical examination of one segmenting stolon indicates that 

 the segmentation is probably like that of 8. fusiformis-runcinata. 

 Two blocks were measured and the average of the two rows 

 taken for the graphs. (Fig. 14.) The short block was meas- 

 ured twice, the long one but once. For the short chain the 

 graph shows twenty-three zooids. A twenty-fourth was present 



ii ij i3 17 19 2i t3 a n a a a a 37 is 41 43 45 47 49 

 Figure 14. 



but was so torn that it could not be measured accurately. Its 

 Length was certainly not more than seventy-five, probably less, 

 and would make the form of the graph resemble the others more 

 closely. The general scheme shown in the graphs of the other 

 species holds here also as the figures show (Table IV). 



